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A block of mass 2kg is sliding with a constant velocity of 8m/s on a friction less horizontal surface. The force exerted on the horizontal


KARSANG YANI 11th Jul, 2019
Answer (1)
NAVEEN MEENA Student Expert 11th Jul, 2019

Dear Karsang, According to the Newton’s law of inertia (Newton’s First Law of Motion) the body can move with a constant speed only if it is acted upon by the balanced forces.In this question as the body of 2 kg is sliding with a constant velocity the gravitational pull of the earth on it is balanced by the opposing force (friction). So the force balancing the gravitational pull of the earth is equal to its weight = 2 ⨯9.8 N = 19.6 N

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11th Jul, 2019
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