What is the kinetic energy of a 150 kg object moving at a velocity of 15 m/s?
25312.5 j
16875 j
50625 j
33750 j

16875joules

Explanation:

Mass=m=150kg velocity=v=15m/s

kinetic energy =(m x v^2)/2

Kinetic energy =(150x15^2)/2

Kinetic energy =(150x225)/2

kinetic energy =33750/2

Kinetic energy =16875joules

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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