Question

When we compress a spring from equilibrium to x cm, we gain a

elastic potential energy. When we compress the spring from x cm to 2x

cm we gain an elastic potential energy which is

equal to that of the first case

2. A body is at rest on a table. Regarding the force that the table exerts on the body, it can be said that:

A) It is equal to the weight of the body

B) It is greater than the weight of the body

C) It is less than the weight of the body

D) Nothing can be ensured

double that of the first case

triple that of the first case

one and a half times less than in the first case.

3. A bag is gently pushed from the top of an A-wall and oscillates in a vertical plane at the end of a rope of length l, determine the angle θ at which the rope will break knowing that it can withstand a maximum tension of double the weight of the bag. How far from the wall does the bag fall?

Answer 1