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

112500 J

Explanation:

Kinetic energy, KE is given by

where m is the mass of the school bus while v is the velocity

The change in kinetic energy is given by

where the subscript f and i denote final and initial speeds

we need to know the time interval during which the force acts. impulse of force = momentum change

so easy. just google the electromagnetic waves and it’ll pop up.