Question

***Please help! Urgent***

1.) How can you calculate the mechanical advantage a simple machine provides?

• simple machines do not provide a mechanical advantage
• divide the output force by the input force
•divide the output displacement by the input displacement
•divide the output force by the output displacement

2.) How can a simple fixed pulley make a job easier?

•by changing the direction at which the force needs to be applied
•by decreasing the force required to lift the object
•by decreasing the work done
•by decreasing the distance that the force needs to be applied

3.) A pulley system has a mechanical advantage of 3, and an object weighing 9 Newtons must be lifted 15 meters. How much force must be applied to lift the object? Use the following equation to find the answer:
(Picture attached)

• 3N
•1.7N
•0.3N
•27N

4.) How is the work theorem represented as an equation?

•ΔW = ΔE
• W = E
• ΔW = E
• W = ΔE

5.) A simple machine increases the distance that a force needs to be applied from 3 meters to 27 meters, and the work done is 216 Joules. How much force is applied?

•8N
•9N
•72N
•81N

Answer 1

1.) To calculate the mechanical advantage a simple machine provides, divide the output force by the input force. The formula is:

Mechanical Advantage = Output force / Input force

2.) A simple fixed pulley can make a job easier by changing the direction at which the force needs to be applied. It does not decrease the force required to lift the object, decrease the work done, or decrease the distance that the force needs to be applied.

3.) Using the equation provided in the picture, we can solve for the force required to lift the object:

Mechanical Advantage = Output force / Input force
3 = Output force / 9N
Output force = 3 x 9N = 27N

Therefore, 27 Newtons of force must be applied to lift the object.

4.) The work theorem is represented by the equation:

ΔW = ΔE

where ΔW is the change in work, and ΔE is the change in energy.

5.) We can use the work formula W = F × d, where W is the work done, F is the force applied, and d is the distance moved. Since the work done is given as 216 Joules and the distance moved is increased from 3 meters to 27 meters, we can find the force applied as follows:

216 Joules = F × 27 meters
F = 216 Joules / 27 meters = 8N

Therefore, 8 Newtons of force is applied.