Question Detail

PHY 101 Physical Quantities, Units, and Dimensions Objective Question

Question

Which of the following physical quantities has the dimensional formula MLT⁻²?
Options
A Velocity
B Acceleration
C Force
Correct Answer
D Momentum
Correct Answer

Option C is the correct answer.

Detailed Explanation

Force is defined as mass (M) times acceleration (LT⁻²). Therefore, its dimensional formula is M × LT⁻² = MLT⁻². Velocity is LT⁻¹, acceleration is LT⁻², and momentum is MLT⁻¹.

Hint

Use the definition F = ma. Substitute the dimensions for mass (M) and acceleration (L T⁻²).

Question Info