Chapter 11, Problem 70A

To determine

To complete: The given problem so that it can be solved using the conservation of mechanical energy.

Explanation of Solution

Introduction:

The law of conservation of mechanical energy states that mechanical energy of the system remains constant when the conservative forces acting in the system.

Explanation: 

Mechanical energy is sum of kinetic and potential energy. Consider the following problem, in such way that mechanical energy conservation concept should be used.

“A cartoon character is holding a 50 kg anvil at the edge of the cliff,100 m high. He released it from the edge. Find the velocity of anvil when it reaches the ground.”

(b)

To determine

To complete: The given problem so that it can be solved using the Newton’s second law.

Explanation of Solution

Introduction:

A body is acceleration when it is acted by external force.It is a vector quantity.

According to Newton's second law, the momentum of a body is changed by applying external unbalanced force. The magnitude of force depends on mass times the acceleration of a body.

Conclusion:

The possible problem will be: “A cartoon character is holding a 50 kg anvil at the edge of the cliff and thrown up. A 10 N of force is applied on anvil.Find its acceleration.”