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Calculate the work required to be done to stop a bus of mass thousand kg moving at a velocity of 36 kilometre per hour

Calculate the work required to be done to stop a bus of mass thousand kg moving at a velocity of 36 kilometre per hour

Grade:9

1 Answers

ats
103 Points
2 years ago
According to work energy theorem, the work done in stopping the bus will be equal to change in its kinetic energy
Conerting units, 36 km/hr = 10 m/s
Initial kinetic energy = ½ x m x v2
                                 = ½ x 1000 kg x (10 m/s)2
                                 = 50000 Joules
Final kinetic energy = 0
 
Work done = | Change in kinetic energy | = 50000 J

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