Question

A school bus weighing 1000 kg slows down from 15 m/s to a stop. What is the change in kinetic energy?

Answer 1

112500 J

Step-by-step explanation:

Kinetic energy, KE is given by

`KE=0.5mv^(2)` where m is the mass of the school bus while v is the velocity

The change in kinetic energy is given by

`0.5mv_f^(2)- 0.5mv_i^(2)` where the subscript f and i denote final and initial speeds

`0.5*1000(0^(2)-15^(2))=-112500 J`