Question

The force required to import you a car a velocity of $30m/s$ in $10$ seconds starting from rest. The mass of the car is $1500kg$:

• A. $3000kg$
• B. $4500kg$
• C. $5000kg$
• D. $6000kg$

Answer 1

The correct option is B $4500kg$

When a car starts from the rest, its initial velocity is $0$ and here its moving velocity is mentioned to be $30m/s.$

So$,$ the difference in these two velocities is $30–0=30m/s.$

Hence$,$ the acceleration of the car is calculated as this difference in velocities $/$ time$,$

means here it is $30/10=3.$

The formula for finding the force is acceleration $\times$ mass$,$ $i.e.$ $1500\times 3=4500kg$

Hence,

option $\left(B\right)$ is correct answer.