Question

Calculate the amount of work required to stop a car of 1000 kg moving with a speed of 72 km/h 2
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Answer 1

Answer:

Explanation:

Here ,

Initial Velocity = u = 72 km/h = 20m/s

Final Velocity = v = 0 m/s

Mass of the body = m = 1000 kg

Now using the concept of Work Energy Theorem :

Work Done = ½mv²-½mu² = 0-½×1000×20 = 10000 N

The total work done is 10000 N.