Physics
A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:
150 J
100 J
50 J
75 J
150 J
m=4 kg_x000D_
u=5 m/s_x000D_
v=10 m/s_x000D_
according to work energy theorem_x000D_
w=1/2*m*(v-u)_x000D_
w=1/2*4*(10-5)_x000D_
w=1/2*4*(100-25)_x000D_
w=2ร75_x000D_
w=150 J
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