Question

A toy cart on the end of a string is 0.75 m long.

a) True
b) False

Answer 1

The correct answer is b) False. When a boy pushes a box up a ramp, he needs to exert more force than the weight of the box. This is because the force required to move the box against gravity is greater than the force required to push it horizontally.

Step-by-step explanation:

The correct answer is b) False.

When a boy pushes a box up a ramp, he needs to exert more force than the weight of the box. This is because the force required to move the box against gravity is greater than the force required to push it horizontally.

In this case, the ramp is 1.0 m high, which means the vertical distance the box moves against gravity is 1.0 m. The work done against gravity is given by the formula: work = force x distance. So, the work done against gravity is 300 N x 1.0 m = 300 J. Since work is equal to force x distance, the force required to move the box up the ramp is 300 N, not 100 N.