A bus is moving with 90km/h if the mass of that bus is 1500kg what is the velocity of the body?
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FORMULA :-
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S² - U² = 2AS
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Answer:
Mass of the car (m) = 1500 kg
Velocity (v) = 60 km/hr
v = 60 x 5/18
v = 16.67 m/s
The car is in motion, so its energy is,
Kinetic Energy (K.E) = 1 /2 mv2
K.E = 1/ 2 × (1500) × 277.88 J
K.E = 208416.7 J
The kinetic energy of the car, when it comes to rest = 0 J
Work done on object = change in kinetic energy
= 208416.7 – 0
= 208416.7 J
Hence, the work required to stop the car is 208416.7 J.
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