Question

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?(1 point)
Responses

9 N
9 N

81 N
81 N

72 N
72 N

8 N
4.How is the work energy theorem represented as an equation?(1 point)
Responses

ΔW=E

W=E
cap w is equal to cap e

W=ΔE

ΔW=ΔE
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:

MA=Fo/Fi

(1 point)
Responses

0.3 N
0.3 N

1.7 N
1.7 N

27 N
27 N

3 N
2.How can a simple fixed pulley make a job easier?(1 point)
Responses

by decreasing the distance that the force needs to be applied
by decreasing the distance that the force needs to be applied

by changing the direction at which the force needs to be applied
by changing the direction at which the force needs to be applied

by decreasing the force required to lift the object
by decreasing the force required to lift the object

by decreasing the work done
1.How can you calculate the mechanical advantage a simple machine provides? (1 point)
Responses

divide the output displacement by the input displacement
divide the output displacement by the input displacement

divide the output force by the input force
divide the output force by the input force

Simple machines do not provide a mechanical advantage.
Simple machines do not provide a mechanical advantage.

divide the output force by the output displacement

Answer 1

1. divide the output force by the input force

2. by changing the direction at which the force needs to be applied

3. 3 N (Fi = Fo / MA = 9 N / 3 = 3 N)

4. W = ΔE

5. 8 N (F = W / d = 216 J / 27 m = 8 N)