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Get Answers to all your Questions
A vehicle of mass 840 kg is moving on a straight and level road at 72 Km / h. Suddenly, the brakes are applied reducing the speed to 36 km / h. Calculate the work of the force exerted by the brakes on the variation of speed.
Answers (1)
Mass = 840 kg,
Initial velocity = 72 km/hr = 72 × 5/18 = 20 m/s
Final Velocity = 36 km/hr = 36× 5/18 = 10 m/s
Work by force = Change in Kinetic Energy
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