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Question

In the figure shown, the forces are acting simultaneously on the body of mass 10 kg which is initially at rest. Find its velocity after 10 s.

A
10 m/s
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B
20 m/s
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C
25 m/s
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D
30 m/s
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Solution

The correct option is C 25 m/s
Net force on the system will be
ΣF=20+105=25 NΣF=maa=2510=2.5 m/s2
Now, we can use 1st equation of motion to find velocity
v=u+at=2.5×10=25 m/s

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