PLEASE HELP ME this is due in 20 mins!!!!!
See how a block and tackle system can increase your mechanical advantage. You will need two broomsticks, a rope, and two helpers.

A. Give each helper a broom stick and have them stand facing each other holding the broomstick firmly in both hands in a horizontal position. The broomsticks should be at the same level, about two feet apart.

B. Tie one end of the rope to one of the broomsticks. (You may need to have one of your helpers hold the knot firmly in one hand as he or she holds the broomstick to help anchor it.)

C. Wrap the rope around the other broomstick, as in a simple pulley system, and pull on the free end of the rope. Your helpers should resist your pulling. What happens? Can you pull the broomsticks together?

D. Now weave the rope back over the first broomstick, so you have a double pulley. Pull on the free end. What happens now? Can you pull the broomsticks together? What is your mechanical advantage?

E. Try weaving the rope over the broomsticks one or two more times. Describe what happens, and state the mechanical advantage of each situation.

F. Write a summary of what happened and an explanation using the terms:

force
distance
work
mechanical advantage

Answer:

Force = 35 N

Explanation:

From Newton's third law of motion, the boy must apply a force greater than the weight of the sled to lift it.

weight of sled = mg

where m is its mass and g the force of gravity on it.

weight of sled = 50 N

Force applied by the boy on the sled = 15 N

Since the force applied on the sled by the boy is lesser than the weight of the sled, then;

Force that the sled exerts on the student = 50 - 15

                                             = 35 N

The force exerted by the sled on the student is 35 N.

Answer:

cell membrane- controls what goes in and out of a cell

cell wall- protects DNA and other organelles inside a cell

ribosomes-makes and produces proteins

Answer:

True

Explanation:

It is a true statement that "Patriotism and education are traditional American values."

The 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;

Hence, it is a true statement that "Patriotism and education are traditional American values."

Learn more about patriotism: https://brainly.com/question/779632

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.

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 × 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

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

Answer:

K.E = 100 J

Final P.E = 100 J

Explanation:

The kinetic energy of any object can be given by the following formula:

[tex]K.E = (\frac{1}{2})mv^{2}[/tex]

where,

K.E = Kinetic Energy

m = mass of ball = 2 kg

v = speed of ball

Initially, v = 10 m/s. Therefore, the initial K.E is given as:

[tex]K.E = (\frac{1}{2})(2\ kg)(10\ m/s)^{2}[/tex]

K.E = 100 J

Now, at the highest point the K.E of the ball becomes zero. because the ball stops for a moment at the highest point and its velocity becomes zero. So, from Law of Conservation of energy:

Initial K.E + Initial P.E = Final K.E + Final P.E

Initial P.E is also zero due to zero height initially.

K.E + 0 = 0 + Final P.E

Final P.E = 100 J

Answer:

Fr = 26.83 [N]

Explanation:

To solve this problem we must use the Pythagorean theorem, since the forces are vector quantities, that is, they have magnitude and density. Therefore the Pythagorean theorem is suitable for the solution of this problem.

[tex]F_{r}=\sqrt{(12)^{2}+(24)^{2} } \\F_{r}=26.83[N][/tex]

Answer:

6.67x10^-11 N-m^2/kg^2

Explanation:

Answer:

a = - 0.209 [m/s²]

Explanation:

To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

We will take the positive forces to the right and the negative forces to the left.

[tex]155-277+113=43*a\\-9=43*a\\a = - 0.209[m/s^{2} ][/tex]

The negative sign means that the box accelerates in a negative direction to the left.

Answer:

[tex]\boxed {\boxed {\sf 6 \ meters \ per \ second}}[/tex]

Explanation:

Speed can be found by dividing the distance by the time.

[tex]s=\frac{d}{t}[/tex]

The distance is 18 meters and the time is 3 seconds.

[tex]d= 18 \ m \\t= 3 \ s\\[/tex]

Substitute the values into the formula.

[tex]s=\frac{18 \ m }{ 3 \ s }[/tex]

Divide.

[tex]s= 6 \ m/s[/tex]

The speed of the puck is 6 meters per second.

Answer:

Speed

As we know that

[tex] \sf Speed = \dfrac{Distance}{Time} [/tex]

[tex] \sf \: Speed = \dfrac{18}{3} [/tex]

Cancelling both by 3

[tex] \sf \: Speed = 6 \: mps[/tex]

Answer:

The Enlightenment.

Explanation:

The Enlightenment took place during the eighteen century and it typically involved a period of philosophical, cultural and intellectual movement in which ideas on nature, reason, humanity and God were emphasized on greatly over science and superstition through meetings that were held at coffeeshops, scientific academies, literary salons, masonic lodges, etc. Some of the influential philosophers of the enlightenment were Adam Smith, John Locke, Jean Jacques Rousseau, David Hume, Baruch Spinoza, Montesquieu, Hugo Grotius, Denis Diderot, Gottfried Wilhelm, Cesare Beccaria, Immanuel Kant etc. The enlightenment was also known as the age of reason or the age of enlightenment.

Hence, the enlightenment was a period in European history when many educated people stressed the importance of learning and reasoning; education was considered the key to understanding and solving society's problems.

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

Answer: 4V

Explanation:

If 300j of energy is available for every 75c of charge, the voltage will be calculated by dividing the available energy by the charge. This will be:

= 300 / 75

= 4v

Therefore, the potential Difference will be 4V.

Answer:

1.55m

Explanation:

The formula for calculating the maximum height is expressed as;

H = u²/2g

u is the initial velocity

g is the acceleration due to gravity

Substitute

H = 1²/2(9.8)

H = 1/19.6

H = 0.051m

Since it is launched form a height of 1.5m, the height above the ground will be 1.5+0.051 = 1.55m

Answer:

in my calculation the answer is letter a but in goo gle the answer is letter c

which one will you trust?

Explanation:

dont report me or i will report you

Explanation:

Work done = F * d = 100N * 0.5m = 50J.

Answer:

If we want to change the kinetic energy of a massive object, we must do work on it. For example, in order to lift a heavy object, we must do work to overcome the force due to gravity and move the object upward. If the object is twice as heavy, it takes twice as much work to lift it the same distance.

Explanation:

Answer:

1. kinetic is when an object is moving and potential where the object is place

2. W and Y

3. X and Z

Answer:

never scared

that might help you

Answer:

Option (4)

Explanation:

Given polynomial is,

P(x) = 1x³ - 7x² + 2x + 40

If (x - 5) is a factor of the given polynomial,

Synthetic division by x = 5,

5 |  1    -7     2     40

    ↓    5   -10   -40

     1    -2    -8      0

Therefore, factored form of the polynomial will be,

P(x) = (x - 5)(x²- 2x - 8)

Now we further factorize the expression (x² - 2x - 8),

(x² - 2x - 8) = x²- 4x + 2x - 8

                  = x(x - 4) + 2(x - 4)

                  = (x + 2)(x - 4)

Now fully factored form of the polynomial will be,

P(x) = (x - 5)(x + 2)(x - 4)

Therefore, remaining factors of the polynomial other than (x - 5) are (x - 4)(x + 2)

Option (4) will be the correct option.

Answer: FUNDAMENTAL unit are the accepted standard units while DERIVED units are developed from combinations of fundamental units.

Explanation:

FUNDAMENTAL UNITS are the generally accepted units which includes the following with their symbols in international system of units:

--> length (meter) m

--> mass (kilogram) kg

--> time( second) s

--> temperature (Kelvin) k

--> current (ampere) A

--> luminous intensity ( Candela) cad

--> amount of substance ( mole) mol

DERIVED UNITS are usually developed from fundamental units and they include the following with their symbols in international system of units:

--> Area ( m²)

--> Volume (m³)

--> Speed ( m/s)

--> Velocity ( m/s)

--> Acceleration ( m/s²)

--> Force ( kgm/s²)

--> Density ( kgm/s³)

--> Power ( J/ s)

--> Pressure ( N/m²)

Answer:

-180 V

Explanation:

Given that,

No. of turns, N = 150

If the field increases uniformly from 0.00 T to 0.95 T and each coil of wire has an area of 1.4 m²

The coil will move perpendicular through a uniform magnetic field in 1.1 s.

We need to find the magnitude of the induced emf in the coil. The formula for the induced emf is given by :

[tex]\epsilon=\dfrac{-d\phi}{dt}\\\\=\dfrac{-d(BA)}{dt}\\\\=-A\dfrac{dB}{dt}[/tex]

Put all the values,

[tex]\epsilon=-NA\dfrac{dB}{dt}\\\\=-150\times 1.4\times \dfrac{0.95-0}{1.1}\\\\=-181.36\ V[/tex]

Out of four options, induced emf is (-180 V)

So, induced emf in the coil is (-180 V). Hence, the correct option is (c).

Hope this helps.......☺

Answer:

115.3 is the direction of the vector. Just learned some physics to get this answer over the past 3 hrs

Answer:

a. 6.39 s b. 255.6 m c. 62.6 m/s

Explanation:

a. Find the time it takes to hit the ground.

Using y = ut + 1/2gt² where y = height of cliff = 200 m, u = initial vertical velocity of ball = 0 m/s, g = acceleration due to gravity = 9.8 m/s² and t = time taken for ball to hit the ground.

So, substituting the values of the variables into the equation, we have

200 m = 0 m/s × t + 1/2 × 9.8 m/s² × t²

200 m = 0 + (4.9 m/s²)t²

200 m = (4.9 m/s²)t²

dividing both sides by 4.9 m/s², we have

t² = 200 m ÷ 4.9 m/s²

t² = 40.82 s²

taking square root of both sides, we have

t = √(40.82 s²)

t = 6.39 s

b. Find the RANGE, distance traveled horizontally.

The range is the horizontal distance traveled by the ball, R = vt where v = horizontal velocity of ball = 40 m/s and t = time taken for ball to hit the ground = 6.39 s

So, R = vt

= 40 m/s × 6.39 s

= 255.6 m

c. Find the final vertical velocity.

Using v = u - gt where u = initial vertical velocity of ball = 0 m/s, v = final velocity of ball, g = g = acceleration due to gravity = 9.8 m/s² and t = time taken for ball to hit the ground = 6.39 s.

So, substituting the values into the equation, we have

v = 0 m/s - 9.8 m/s² × 6.39 s

v = -62.62 m/s

v ≅ -62.6 m/s

Given :

A car slows down from -27.7 m/s to -10.9 m/s while undergoing a displacement of -105 m.

To Find :

The acceleration of the car.

Solution :

We know, by equation of motion :

[tex]2as = v^2 -u^2\\\\a = \dfrac{v^2 -u^2 }{2s}\\\\a = \dfrac{(-10.9)^2 - ( -27.7)^2}{2\times ( -105 )}\\\\a = 3.088\ m/s^2[/tex]

Therefore, acceleration of the car is 3.088  m/s².

Answer:the nervous system

Explanation:

Anatomy vs Physiology as the Anatomy is the study of the structure of living organisms, while Physiology is the study of the function of living organisms.

Nervous System the nervous system integrates and controls the body's functions through electrical and chemical signaling. Anatomy focuses on the physical makeup of living organisms and their components, such as organs, tissues, and cells.

This includes the external and internal structures of the body, as well as the relationships between these structures. On the other hand, Physiology examines how living organisms perform the functions necessary for life, such as respiration, digestion, circulation, and movement.

Physiology explores the processes and mechanisms behind these functions, including biochemical reactions, electrical and mechanical events, and hormonal regulation.

The nervous system consists of the brain, spinal cord, and a network of nerves that extend throughout the body. It is responsible for collecting, processing, and transmitting information about the internal and external environment to the rest of the body.

The nervous system also regulates the activity of other systems in the body, such as the endocrine, cardiovascular, and respiratory systems.

To know more about function of nervous system here:

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