Question

Which of the following involves the application of a force?

• A. Lifting a heavy object.
• B. Bending an aluminium rod.
• C. Pushing a huge rock.
• D. Light ray falling on an object.

Answer 1

Answer: (A), (B), (C)

Pushing a huge rock.

Force is defined as an effort that can change the state of motion or shape of an object.
A light ray does not bring any change in the state of motion or shape of an object. Hence, it doesn't involve the application of a force.
However, for pushing a rock, bending an aluminium rod, or lifting a heavy object, a force is required.