Question

A mover's dolly is used to pull a 115 kg refrigerator up a ramp into a house. The ramp is 2.10 m long and rises 0.850 m. If 1042 J of work is done, what is the exerted force?

A) 498.62 N
B) 115 N
C) 812.16 N
D) 253.33 N

Answer 1

To find the exerted force, you can use the formula: Work = Force x Distance. Given the work done, we can rearrange the formula to solve for force. Therefore, the exerted force is approximately 495.24 N (option A).

Step-by-step explanation:

To find the exerted force, we can use the formula:

Work = Force x Distance

Given:

• Work = 1042 J
• Distance = 2.10 m
• Mass of refrigerator = 115 kg
• Height of ramp = 0.850 m

The work done is equal to the force exerted multiplied by the distance. In this case, the work done is equal to the force exerted multiplied by the horizontal distance traveled (2.10 m). Since the work done is given as 1042 J, we can rearrange the formula to solve for force:

Force = Work / Distance

Force = 1042 J / 2.10 m

Force = 495.24 N

Therefore, the exerted force is approximately 495.24 N (option A).