Answer:
The work done by Ramas is 3920 N.
Explanation:
Given;
mass of the load lifted by Ramas, m = 20 kg
height through which the load is lifted, h = 20 m
The work done by Ramas is equal to gravitational potential due to the height in which the load is lifted.
W = PE = mgh
where;
g is acceleration due to gravity = 9.8 m/s²
W = 20 x 9.8 x 20
W = 3920 N.
Therefore, the work done by Ramas is 3920 N.
Two balls, ball A and ball B, are dropped from the same height onto the same surface. If ball A rebounds to a higher height than ball B then:(3) A. ball A is more elastic than ball B. B. ball B is more elastic than ball A. C. not enough information is given to determine which ball is more elastic.
Answer:
its b
Explanation:
If a small motor does 520 J of work to move a toy car 260 m in 3.0 seconds, how much power is being applied by the motor?
Answer:
P = 173.33 [W]
Explanation:
Power is defined as the amount of work done over a given time.
W = work = 520 [J]
t = time = 3 [s]
P = power [w]
Therefore by working relationship over time we can calculate the power.
[tex]P =W/t\\P = 520/3\\P=173.33[W][/tex]
Please answer ASAP!!
Which of the following is the best reason to read the laboratory procedure before beginning
any type of experiment?
O So you can perform the experiment quickly.
O So you can ask questions about steps you do not understand.
O So you can answer all the questions at the end of the lab.
O So you can decide when is the best time of day to complete the lab.
Answer:
O So you can ask questions about steps you do not understand.
Explanation:
One of the reasons why it is encouraged that the laboratory procedure must be read at the beginning of any type of experiment is familiarize the student with the experimental procedure. Also, questions that can help make the smooth running of the experiment to proceed can be cleared.
It is to this regard that understanding laboratory procedures is very vital. Students must grasp the details of each steps of the experiment before proceeding with their investigation. Other critical information needed to set up the experiment can also be brought into the lime light.The two equal strong kids are having a tug a war. What do you expect to happen to the ball in this situation
Answer:as per as Newtons second law, The forces exerted on the rope create tension.
As such,The tension is equal to the applied force.The tension is trasmitted to the opposite side and of the rope delivering the applied force.
Hope this helps.. :)
Please help me with this.
Question 7 of 10 What causes magnetic domains? O A. Magnetic poles of magnets attracting each other O B. Electricity moving through iron O C. Magnetic fields of atoms aligning D. Iron being placed near a magnet.
Answer:
C. Magnetic fields of atoms aligning
Answer:
c
Explanation:
a pex
What is the mass of 2.5 moles of carbon?
A-1.5 x 1024 g C
B-30 g C
C-2.5 g C
D-0.21 g C
Answer:
I think no B
if wrong correct me plsssssss
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have a nice day
I will always help you understanding your assingments
#Captainpower:)
1. What is the velocity of a go-kart with a mass
of 25 kg and 50 J of kinetic energy?
Answer:
Explanation:
The formula for KE is
[tex]KE=\frac{1}{2}mv^2[/tex] which makes solving our problem for velocity super easy. We will rewrite the formula in terms of v to get:
[tex]v=\sqrt{\frac{2KE}{m} }[/tex] and filling in:
[tex]v=\sqrt{\frac{2(50)}{25} }[/tex] so
v = 2 m/s to the correct number of sig fig's
what is meant by lenght
Answer:
the size of something from one end to the other; how long something is
A 4000-kg car bumps into a stationary 6000kg truck. The Velocity of the car before the collision was +4m/s and -1m/s after the collision. What is the velocity of the truck?
Answer:
The velocity of the truck is 3.33 m/s
Explanation:
Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is
P=mv.
If we have a system of bodies, then the total momentum is the sum of the individual momentums:
[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]
If some collision occurs, the velocities change to v' and the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]
In a system of two masses:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
There are two objects: The m1=4000 Kg car and the m2=6000 Kg truck. The car was moving initially at v1=4 m/s and the truck was at rest v2=0. After the collision, the car moves at v1'=-1 m/s. We need to find the velocity of the truck v2'. Solving for v2':
[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2}[/tex]
Substituting:
[tex]\displaystyle v'_2=\frac{4000*4+6000*0-4000(-1)}{6000}[/tex]
[tex]\displaystyle v'_2=\frac{16000+4000}{6000}[/tex]
[tex]\displaystyle v'_2=3.33[/tex]
The velocity of the truck is 3.33 m/s
Two bodies of mass 10 kg each are separated by 1 metre, the force of attraction between them is
a) 6.67 x 10-N b) 6.67 x 10'N c) 6.67 x 10 N d) 6.67 x 10'Nial
99
Answer:
6.67x10^-11 N-m^2/kg^2
Explanation:
Enter the appropriate word(s) to complete the statement. (Choose from the words between parentheses)
In a inelastic , elastic)-
collision, both momentum and kinetic energy are conserved
-
Answer:
The correct option is;
Elastic
Explanation:
In an elastic collision, the initial kinetic energy of the system is equal to the final kinetic energy of the system, such that there is no loss in the net kinetic energy available at a specific time or stage in the system
Therefore, we have;
1/2·m₁·v₁₁² + 1/2·m₂·v₂₁² = 1/2·m₂·v₁₂² + 1/2·m₂·v₂₂²
From which we get;
m₁·v₁₁ + m₂·v₂₁ = m₂·v₁₂ + m₂·v₂₂
Which is indicates that the initial and momentum of the system is also conserved
Therefore, in an elastic collision, both momentum and kinetic energy are conserved.
How does an increase in thermal energy affect the temperature of each state of matter?
Answer:
Explanation:
When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation). ... When the pressure exerted on a substance increases, it can cause the substance to condense.
Answer:
Gases have the highest kinetic energy of any state of matter and thus occur at the highest temperatures. Increasing the temperature of a gas in an open system will not further change the state of matter because the gas molecules will only become infinitely further apart.
The number of student of schoolwas 450 last year and it is 396 this year.By how many percent did the number decrease
Answer:
12%
Explanation:
number of students decreased=54
percentage of students decreased= 54/450 x 100
=12%
A tourist stands at the top of the Grand Canyon, holding a rock, overlooking the valley
below. Find the final velocity, and displacement of the rock after 4.0 seconds give the three
initial conditions listed below.
Answer:
a. Vf = 39.24 [m/s]
b. Vf = 31.24 [m/s]
c. Vf = 47.24 [m/s]
Explanation:
To solve this problem we can use the following equation of kinematics. We have to keep in mind that the gravitational acceleration acts downwards, therefore when the rock falls towards the abyss it has the same direction of the acceleration and that is why the gravitational acceleration has a positive sign in the equation.
[tex]v_{f}=v_{o}+g*t[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity = 0 (when the rock is dropped)
g = gravitational acceleration = 9.81 [m/s²]
t = time = 4 [s]
a.
[tex]v_{f}=0+9.81*4\\v_{f}= 39.24 [m/s][/tex]
b.
In this particular situation, the acceleration will be taken as negative because the gravity is pointing in the opposite direction of the movement of the rock.
[tex]v_{f}=8-(9.81*4)\\v_{f}=-31.24[m/s][/tex]
The negative sign in the answer tells us that the rock no longer moves up instead it does downwards when 4 seconds have passed.
c.
[tex]v_{f}=8+(9.81*4)\\v_{f}=47.24[m/s][/tex]
PLZ HELP I DON'T UNDERSTAND!! a boy is playing catch with his friend. He throws the ball straight up. When it leaves his hand, the ball (2kg) is traveling 10m/s. Whats the ball's kinetic energy just as it leaves the boy's hand? What is the potential energy of the ball when it reaches the highest point?
Explanation:
The mass of a ball, m = 2 kg
It is traveling with a speed of 10 m/s
The ball's kinetic energy just as it leaves the boy's hand is calculated as follows :
[tex]K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 2\times (10)^2\\\\=100\ J[/tex]
The ball's kinetic energy just as it leaves the boy's hand is 100 J. The potential energy of the ball when it reaches the highest point is same as the kinetic energy as it leaves the boy's hand.
Hence, the required kinetic and potential energy is 100 J.
A 120 -kg crate accelerates toward the positive x-direction . If the magnitude of the force due to friction is 74.4 N , what force must pull on the crate to give it a 2.5 m/s ^ s acceleration ?
Answer:
The applied force to accelerate the crate is 374.4 N
Explanation:
Given;
mass of the crate, m = 120 kg
magnitude of force due to friction, Fk = 74.4N
acceleration of the crate, a = 2.5 m/s²
The net horizontal force on the crate is calculated as;
∑Fx = F - Fk
ma = F - Fk
F = ma + Fk
where;
F is the applied force to accelerate the crate by 2.5 m/s²
F = (120 x 2.5) + (74.4 N)
F = 300 N + 74.4 N
F = 374.4 N
Therefore, the applied force to accelerate the crate is 374.4 N
who was the first president of the united states
Answer:
George Washington
Explanation:
Answer:
well for me
Explanation:
It was George Washington
Difference between rest and motion?
Answer:
Rest and motion are relative terms. In simple terms, an object that changes its position is said to be in motion while the opposite action causes an object to be at rest.
Explanation:
A body of mass 60kg is displaced through 90m in 4 second when force is applied to it.calculate acceleration and the force applied
Answer:
force=337.5N
accelertion=5.63ms^-2
Explanation:
please find the answers in the pictures above maam or sir.
Patriotism and education are traditional American values. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
It is a true statement that "Patriotism and education are traditional American values."
The United States of AmericaThe United States of America are bound together by certain core values that hold the entire country together. These values are reverberated any time the ideals of the country are discussed.
Two of the key values of the American society are;
PatriotismEducationHence, it is a true statement that "Patriotism and education are traditional American values."
Learn more about patriotism: https://brainly.com/question/779632
A student designs an experiment to demonstrate the conservation of gravitational potential and kinetic energy. She drops a wooden block from rest through a photogate 2 m below. If energy is conserved, how fast should the block be traveling when it passes through the photogate?
A.
2.0 m/s
B.
6.3 m/s
C.
9.8 m/s
D.
19.6 m/s
Answer:
6.3 m/s
Explanation:
A student drops a wooden block from rest through a photogate 2 m below. Since there is a conservation of the gravitational potential energy and the kinetic energy, the final speed of the block is B. 6.3 m/s.
Gravitational potential energy and kinetic energyGravitational potential energy: is the potential energy a massive object has in relation to another massive object due to gravity.Kinetic energy: is a form of energy that an object or a particle has by reason of its motion.A wooden block is dropped from rest. If energy is conserved, the initial gravitational potential energy (U₁) will be equal to the final kinetic energy (K₂).
U₁ = K₂
m × g × h₁ = 1/2 × m × v₂²
where,
m is the mass of the object.g is the gravity.h₁ is the initial height.v₂ is the final speed.m × g × h₁ = 1/2 × m × v₂²
g × h₁ = 1/2 × v₂²
v₂ = √(2 × g × h₁)
v₂ = √(2 × (9.8 m/s²) × 2 m) = 6.3 m/s
A student drops a wooden block from rest through a photogate 2 m below. Since there is a conservation of the gravitational potential energy and the kinetic energy, the final speed of the block is B. 6.3 m/s.
Learn more about conservation of energy here: https://brainly.com/question/14525402
A little girl jumps up from the ground. What force makes her move up?
Answer:
Gravity (please mark me as the brainiest)
Explanation:
Gravity is a force caused by a large body, such as the Earth. Gravity pulls objects toward the Earth.
And give me a thanks, or vote
Imagine that it is summer solstice in the Northern Hemisphere. What is the date, and where is the Sun? What is happening in the Southern Hemisphere? Please help
21 june is the date......hopi it will help
Answer:
June 22 North Pole tited to the sun, and its winter in the southern hemesphere
Explanation:
a stone is tied to one end of string. holding to the other end , the string is whirled in the horizontal plane with progressively increasng speed it breaks at some speed bexause
Answer:
Breaks because it doesn't have force in the radial direction and thus due to inertia the stones will fly off tangentially.
Explanation:
Until the stone is tied to a string, it will possess centripetal force and centrifugal force along the radial direction of motion due to the tension present in the string. Now, when the rope breaks, it breaks because it doesn't have force in the radial direction and thus due to inertia the stones will fly off tangentially.
Neeeee rnnnn ASAP offering 55 points CER: Brielle pushes a shopping cart through the store with an acceleration of 2
m/s2. The mass of the shopping cart with the groceries in it is 22 kg. Guiding
Question: How can Brielle increase the acceleration of the shopping cart?
Answer:
Decease the mass
Increase the force applied
Explanation:
To increase the acceleration of the shopping cart, Brielle should reduce the load inside her cart.
According to Newton's second law of motion;
Force = mass x acceleration
Now, mass is indirectly proportional to the acceleration. The more the mass, the lower the acceleration a body will generate.
Lighter bodies moves with a faster acceleration.
In this case the force applied is constant.
If the force applied is also, increased the acceleration of the body will increase also.
Electricity costs 10p per unit. How much will it cost Sam to use a 85W laptop and a 60W lamp for an hour?
It will cost Sam "1.45 p. per hr" to use an 85W laptop and a 60W lamp. To understand the calculation, check below.
Power and ElectricityAccording to the question,
Electricity cost = 10 p per unit
Laptop power = 85 W
Lamp power = 60 W
We know the standard unit, KW/hr = 1000 W/hr
then,
= 85 + 60
= 145 W
By fractioning,
= [tex]\frac{145}{1000}[/tex]
= 0.145 KWH
hence,
The cost will be:
= 0.145 × 10 p
= 1.45 p. per hr
Thus the above approach is correct.
Find out more information about electricity here:
https://brainly.com/question/11517288
is anti-nodes and amplitude same
Explanation:
Antinodes are not the same thing as the amplitude , but they are very closely related. The amplitude is the distance from the rest position of the wave to the antinode . The antinode is just a point along the wave that has the greatest maximum velocity in the y-direction.
The amplitude of a standing wave doesn't remain the same throughout the wave. It keeps on changing as it is a function of x.
Where the amplitude is minimum is called?
The locations at which the absolute value of the amplitude is minimum are called nodes, and the locations where the absolute value of the amplitude is maximum are called antinodes.
Explanation:
Antinodes are not the same thing as the amplitude , but they are very closely related. The amplitude is the distance from the rest position of the wave to the antinode . The antinode is just a point along the wave that has the greatest maximum velocity in the y-direction .
intro urself please
Use the diagram below to answer for the following questions for 2 points each:
1. Explain the difference between kinetic and potential energy.
2. Select two points where potential energy is seen and compare the amount of energy at each point.
2. Select two points where kinetic energy is seen and compare the amount of energy at each point.
Answer:
1. kinetic is when an object is moving and potential where the object is place
2. W and Y
3. X and Z
Is folding aluminum foil a chemical or physical change?
Answer:
Aluminum foil is a physical change. A further explanation is given below.
Explanation:
The processing of aluminum foil starts with either a succession of cool rolling procedures, wherever another density including its aluminum alloy becomes diminished by half amongst every method. Aluminum foil modified thickness and weight, but it would be an aluminum sheet, so it would be a physical transition or change.Jupiter has the strongest gravity of any planet in our solar system. Which quantity will be a maximum there?
A. Density
B. Weight
C. Volume
D. Mass
Answer:
I think the answer is D
Explanation:
I dont have an explanation