Question

15. a) State second law of motion and derive the expression F = m.a

Answer 1

Hey mate...
here is your answer

Second law of motion: Rate of change of momentum of an object is directly proportional to applied unbalanced force.

According to second law of motion :
F= kma
F= ma
if the value of k is 1

Hope it helps you!!!!

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Answer 2

The second law of motion is state that the rate of change of momentum is directly proportional to the applied force on the body .
P = mv F is extern al force dp is a small change in body in a small time st . dp / dt
acc . to 2 nd law .
dp/dt invertly proportional F
F = K dp /dt
F = kd/dt(mv)
Km dv/dy
F = K ma
F = ma