1.

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.

Answer»

Mass of first block m1 = 8 kg 

Mass of second block m2 = 2 kg 

Total mass M = 8 + 2 = 10 kg 

Force applied F = 15 N 

∴ Acceleration a =\(\frac{F}{M}\)

\(\frac{15}{10}\) = 1.5 m/s2 

Force exerted on the 2 kg mass, 

F = ma 

= 2 × 1.5 = 3 N



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