Question

a body of mass 6 kg is acted on by force so that its velocity changes from 3 m/s to 5m/s then change in momentum is​

Answer 1

Explanation:

u=3m/s

v=5m/s

mass=6kg

(momentum)Case 1=mass×u;

=6kg×3m/s

=18kg.m/s

(momentum)Case 1=mass×u;

=6kg×5m/s

=30kg.m/s

change in momentum=(30-18)kg.m/s

=12kg.m/s

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Answer 2

A body of mass 6 kg is acted on by force so that its velocity changes from 3 m/s to 5m/s then change in momentum is​ 12 Kg m/s.

Given:

Initial velocity = 3m/s

Final velocity = 5 m/s

mass = 6kg

To find:

Change in momentum.

solution:

The product of mass along with the velocity is known as a change in momentum.

Momentum is the vector quantity.

Also, Newtons 2nd law of momentum says that the rate of change of momentum is directly proportional to force on a particular particle.

Momentum is represented by P.

S.I. units of momentum are Kg. m/s.

The final velocity = 5m/s = represented by v.

The initial velocity = 3 m/s = represented by u.

P = mass * (change in velocity)

P = mass * (final velocity - initial velocity)

P = mass * (v-u)

P = 6Kg * (5-3) m/s

P = 6 *2 Kg m/s

P = 12 Kg m/s.

Therefore, the change in momentum is 12 kg m/s.

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