Question

An vehicle has a mass of $1500kg$. What must be the force between the vehicle and the road if the vehicle is to be stopped with a negative acceleration of $1.7m{s}^{-2}$?

• A. $2550N$ in a direction opposite to that of the vehicle
• B. $2550N$ in a direction same to that of the vehicle
• C. $1550N$ in a direction opposite to that of the vehicle
• D. $1550N$ in a same opposite to that of the vehicle

Answer 1

The correct option is A $2550N$ in a direction opposite to that of the vehicle

Given,

Mass,$M=1500kg$

Acceleration, $a=-1.7m{s}^{-2}$

Force=mass x acceleration

$F=1500\times (-1.7)=-2550N$

Hence, force is $2550N$ opposite to the direction of motion.