Question

Mass times the rate of change of velocity of an object is equal to:

• A. Speed
• B. Momentum
• C. Force
• D. Displacement

Answer 1

The correct option is C Force

Let the force be $F$, mass be $m$, $u$ be the initial velocity, $v$ be the final velocity, $t$ be the time taken and a be the acceleration.
We know, $F=ma$ and $a=\frac{(v-u)}{t}$
Therefore, we can write $F=m\times \frac{(v-u)}{t}$
where, $\frac{(v-u)}{t}$ is the rate of change in velocity.
Therefore mass times rate of change in velocity gives force.