Question

What is the dimension of Impulse? 
1. MLT¹
2. MLT^-1
3. MLT²
4. MLT-2

Answer 1

Correct Answer - Option 2 : MLT^-1

The correct answer is MLT-1.

• The dimension of a physical quantity is the powers to which the fundamental quantities are raised for the representation of that quantity. 
• Impulse:
  • When a large force acts for a very small time, it causes a change in the momentum. This is called Impulse.
  • Impulse(J) = Force x time duration = Change in momentum. 
  • Dimension = MLT-1.
• The dimension of Impulse is the same as momentum.

• Momentum:
  • The momentum of a body is defined to be the product of its mass m and velocity v and is denoted by p.
  • p = mass x velocity.
• MLT-2  is the dimensional formula of Force.