According to the second law of motion, the rate of change of momentum is proportional to ___________.

Correct option is A

Correct Answer:A. Force

Explanation:
The second law of motion formulated by Sir Isaac Newton states that:

​$$F=\frac{\Delta p}{\Delta t}$$​​

Where:

• F is the force applied,
• Δp is the change in momentum,
• Δt is the time over which the change occurs.

This means the rate of change of momentum of an object is directly proportional to the force applied to it.

Key Points:

• Momentum (p):
  Momentum is defined as the product of mass (m) and velocity (v):

p=mv

• Force and Momentum:
  The greater the applied force, the faster the rate of change of momentum. This principle explains why a stronger force leads to a quicker acceleration of an object.

Other Options Explained:

• Displacement: Displacement refers to the distance moved in a specific direction, not directly related to the rate of change of momentum.
• Inertial: Inertia is a property of mass that resists changes in motion, not the rate of momentum change.
• Energy: Energy is a different physical quantity and does not define the rate of momentum change.