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How much work must be done to stop a 1150 kg car traveling at 120 km/h?

User Mithril
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1 Answer

4 votes

Answer:

The work to be done is 638,761.12 J

Step-by-step explanation:

Given;

mass of the car, m = 1150 kg

velocity of the car, v = 120 km/h = 33.33 m/s

Apply work energy theorem;

W = K.E

where;

W is the work done

K.E is the kinetic energy

W = ¹/₂mv²

W = ¹/₂ (1150)(33.33)²

W = 638,761.12 J

Therefore, the work to be done is 638,761.12 J

User Jiwan
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6.1k points