Question

A force of $50$ $N$ is required to push a car on a level road with constant speed of $10$ $m/s$. The mass of the car is $500$ $kg$. What force should be applied to make the car accelerate at $1$ $m/s^2$?

• A. $550$ $N$
• B. $450$ $N$
• C. $500$ $N$
• D. $2500$ $N$

Answer 1

Answer: (A)

$550$ $N$

Since $50N$ force is required for the car to move with constant velocity.

Additional force applied to move a car of $500kg$ with acceleration of $1m/s^2$is given by

$F=ma$

$F=500\times 1$

$F=500N$

Thus total force applied

$F_T=500+50$

$F=550N$