Physics Force & Motion NUMS 2022
PMDC Verified Question 87 of 137
The time rate of change of velocity is called:
A
Force
B
Acceleration
C
Power
D
Energy
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Acceleration
Concept:

Kinematic definitions link position, velocity, and acceleration through time derivatives.

Formula:

$$ \vec{a} = \frac{\Delta \vec{v}}{\Delta t} $$

Solution:

  • Velocity describes how fast position changes.


  • Acceleration specifically describes how fast velocity itself changes over time (whether speeding up, slowing down, or changing direction).


Why other options are incorrect:

Force is the rate of change of momentum. Power is the rate of doing work. Energy is the capacity to do work.

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