Question

the amount of work done required to stop a moving object is equal to the...​

Answer 1

Answer:

Work done to stop object = kinetic energy lost. A car moving at 100 km/h has 4 times as much kinetic energy as a car moving at 50 km/h. This is because the K.E. is proportional to V squared.

Answer 2

The work required to stop a moving object is equal to its kinetic energy.

• We don't need any work to bring a moving object to rest.
• To bring a moving object to rest, you need to extract energy from it.
• The work required to stop a moving object is present in itself.
• We should apply a retarding force in the opposite direction to bring an object to rest.
• $W=F dx < 0$