a mass of 400 grams slides on a rough horizontal surface if the frictional force is 3 Newton find the magnitude of the contact force take G is equals to 10 metre per second square
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Explanation:
m = 0.4 kg
f = mew × mg
mew = f/ mg = 3/0.4 ×10 = 3/4
mew = tan ©
© = 37 °
contact is balanced by mg cos©
N = mg cos ©
= 0.4 × 10 cos 37°
= 4 × 4/5
N = 16/5 N
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