The change of displacement in a very small interval of time of a body is called its .

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Question 23: The change of displacement in a very small interval of time of a body is called its

• Explanation: Instantaneous velocity is defined as the rate of change of displacement over an infinitesimally small time interval.
• Answer: (C) Instantaneous Velocity

Question 24: The dimensional formula for power is

• Explanation: Power is defined as work done per unit time. Work has dimensions of Force × Displacement ($[M L T^{-2}] \times [L] = [M L^2 T^{-2}]$). Time has dimension $[T]$. Therefore, Power = $[M L^2 T^{-2}] / [T] = [M L^