Physics


Chapter : 2. Force & Laws Of Motion

Examples of Newton's Laws Of Motion

Example : 1
Calculate the force required to produce an acceleration of 5 m/s2 in a body of mass 2.4 kg.
Solution. We know that force = mass × acceleration
= 2.4 kg × 5 m/s2 = 12.0N

Example : 2
A body of mass 2.5 kg is moving with a velocity of 20 m/s. Calculate its momentum.
Solution. Momentum, p = mass × velocity
Here, mass m = 2.5 kg, Velocity v = 20 m/s
∴ Momentum, p = mv = 2.5 × 20 kg-m/s = 50 kg-m/s

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