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Question

A block of 4kg is resting on a rough horizontal plane and is about to move. When a horizontal force of 30n is applied on it find the total contact force exerted by the plane on the block 


Solution

Given
m = 4 kg;
F = 30 N ;
g = 10 ms^-2 

N = mg = 4×10 = 40 N

=> R²=N² + F²
so,

R² = (40)² + (30)²

​​​​R² =1600+900=2500

R = √2500

R= 50 N( Answer)

Thank you :)


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