32. What are the dimensions of impulse? - Sindh Board (stb)

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EXPLANATION


Question: What are the dimensions of impulse?

  • a) ML²T⁻¹
  • b) MLT⁻¹
  • c) M²L²T⁻¹
  • d) MLT⁻¹

 ANSWER: b) MLT⁻¹

EXPLANATION:


The dimension of impulse is given by the symbol "J" and is defined as the change in momentum of an object. The correct dimension of impulse is:

b) MLT⁻¹

In this dimension, M represents mass, L represents length, and T represents time. The dimension for mass is 1 (M) because impulse involves the change in momentum, which has the dimension of mass times velocity. The dimension for length is 0 (L⁰) because impulse is not directly related to length. The dimension for time is -1 (T⁻¹) because impulse is measured as the product of force and time, and force has the dimension of mass times acceleration (MLT⁻²), which when multiplied by time (T), gives the dimension MLT⁻¹ for impulse.

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