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प्रश्न
As shown in figure, a 70 kg garden roller is pushed with a force of F = 200 N at an angle of 30° with horizontal. The normal reaction on the roller is: (Given: g = 10 ms−2)
पर्याय
`800sqrt2 N`
600 N
800 N
`200sqrt3 N`
MCQ
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उत्तर
800 N
Explanation:
Given: g = 10 ms−2
F = 200 N
m = 70 kg
Formula: W = mg
= 70 × 10
= 700 N
Since the force is pushing downward at 30°, its vertical component adds to the weight:
Fy = F sin 30°
= `200 xx 1/2`
= 100 N
Normal reaction balances total downward force:
N = W + Fy
= 700 + 100
= 800 N
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