An object of mass 521 kg, initially having a velocity of 90 m/s, decelerates to a final velocity of 14 m/s. what is the change in kinetic energy of the object, in kj?

2058.992KJ

Explanation:

Given data

Mass of object=521kg

initial velocity=90m/s

Final velocity=14m/s

kinetic energy of body is given by=

change in kinectic energy is given by substracting  final kinetic energy from initial kinetic energy of body.

Change in kinetic energy=

Change in kinetic energy=

Change in kinetic energy=2058.992KJ

answer:

50 vo; ts

explanation:

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