Question Detail

PHY 101 Physical Quantities, Units, and Dimensions Objective Question

Question

Which of the following quantities has the same dimensions as impulse?
Options
A Force
B Energy
C Power
D Momentum
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

Impulse is defined as force multiplied by time (F t). Its dimensions are (MLT⁻²)×T = MLT⁻¹. Momentum is mass times velocity, with dimensions M × LT⁻¹ = MLT⁻¹. Therefore, impulse and momentum have the same dimensions.

Hint

Consider the impulse-momentum theorem. The change in momentum of an object equals the impulse applied to it.

Question Info