Question

The engine of a car produces an acceleration of 4 m $s^{-2}$ in a car, if this car pulls another car of same mass, what is the acceleration produced?

• A. 8 m $s^{-2}$
• B. 2 m $s^{-2}$
• C. 4 m $s^{-2}$
• D. 1/2 m $s^{-2}$

Answer 1

The correct option is A 8 m $s^{-2}$

Let the mass of the car be $m$.

Force $=4m$

The total mass will be $2m$

The acceleration is as follows :

$M=4m/s²$

$2m$ gives

$2m/m\times 4$

$2\times 4=8m/s²$

The acceleration doubles.

$=8m{s}^{-2}$

Hence,

opption $A$ is correct answer.