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Question

In the figure, all surfaces are smooth. Find the acceleration of the body and the force exerted by the floor on the body. (Take g=10 m/s2)

A
0, 100 N
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B
4 m/s2, 200 N
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C
2 m/s2, 210 N
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D
0, 220 N
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Solution

The correct option is D 0, 220 N
FBD of the body is


Net horizontal force:
F=10+102022 =0 N

F=maa=0

Net vertical force:
N202 sin 45o20 g=0N202×1220×10=0N=220 N

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