Question

Name: Han Jack and Jill are doing a physics lab. They apply a 30-Newton force to a 6-kg cart to pull it up an inclined plane at a constant speed. The plane is inclined at a 30-degree angle. Jack and Jill are exerting a force on the cart that is parallel to the inclined plane in order to displace it 2.0 meters along the incline to a final height of 1 meter. During this lab, the amount of work done on the cart is approximately Joules. a. 0 b. 15 С. 40 Pi d. 52 e. 60 f. 90 g. 120 h. 180 60 View Objectives Quit Mission Save Mission

Answer 1

Assuming a gravity acceleration g = 10 m/s²
a force of 30 N is what is just needed to pull a 6 kg mass up to an incline with an angle of 30°.

In such a case, the work done equals the potential energy increase, so:
W = m g h
= 6 kg x 10 m/s² x 1 m = 60 J

Answer (e) is the correct one.

Actually, the information about the 30 N force, the 30° angle and the 2 m displacement is useless, and has probably been put there just in order to confound you.