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Question

A body of mass 10 kg is acted upon by two perpendicular forces, 6N and 8N. The resultant acceleration of the body is

A
1ms2 at an angle of tan1(34)w.r.t. 8N force.
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B
0.2ms2 at an angle of tan1(34)w.r.t. 8N force.
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C
1ms2 at an angle of tan1(43)w.r.t. 8N force.
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D
0.2ms2 at an angle of tan1(43)w.r.t. 8N force.
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Solution

The correct option is A 1ms2 at an angle of tan1(34)w.r.t. 8N force.
Here, m=10 kg
The resultant force acting on the body is
F=(98N)2+(6N)2=10N
Let the resultant force F makes an angle θ w.r.t. 8N force.
From figure, tanθ=6N8N=34
The resultant acceleration of the body is
a=Fm=10N10kg=1ms2
The resulatnt acceleration is along the direction of the resulatnt force.
Hence, the resultant acceleration of the body is 1 ms2 at an angle of tan1(34) w.r.t. 8N force.

1032730_939562_ans_ebf2e46d664d4b40960e112d71fe5f55.png

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