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Question
Two blocks of masses 8 kg and 2 kg respectively lie on a smooth horizontal surface in contact with one other. They are pushed by a horizontally applied force of 15 N. Calculate the force exerted on the 2 kg mass.
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Solution
Given:
m1 = 8 kg, m2 = 2 kg, F = 15 N
F = mtotal, F = (m1 + m2) a = (8 + 2) a = 10 a
15 = 10 a
⇒ a = `15/10` = `3/2` ms-2
Force exerted by mass of 8 kg
F = m1 a = 8 x `3/2` = 12 N.
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