Q

Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?

Q. 17.     Calculate the work required to be done to stop a car of   $1500\; kg$   moving at a velocity of  $60\; km/h$ ?

Views

Firstly convert the velocity in SI unit.

$v\ =\ 60\times \frac{5}{18}\ =\ \frac{50}{3}\ m/s$

Thus the work done to stop the car is equal to the kinetic energy of the car.

$W\ =\ \frac{1}{2}mv^2\ =\ \frac{1}{2}\times 1500\times \left ( \frac{50}{3} \right )^2$

or                                                                              $=\ 208333.33\ J\ or\ 208.33\ KJ$

Exams
Articles
Questions