Question

A cricket ball of mass 800g has the momentum of 10 kgms-1 calculate the velocity of a ball.
(explanation need)​

Answer 1

Answer:

the answer is

$12.5 {ms}^{ - 1}$

Explanation:

linear momentum of the body is product of mass of body and velocity.

linear momentum is represented by p.

in the question momentum (p) =

$10kg {ms}^{ - 1}$

mass of the ball is given as 800g

we have to convert 800g into kg as momentum is given in kg.

1kg = 1000g

therefore, 800g into kg =

$\frac{800}{1000} = 0.8kg$

Now applying the formula of linear momentum

$p = m \times v \\ 10kg {ms}^{ - 1} = 0.8kg \times v \\ \frac{10}{0.8} {ms}^{ - 1} = v \\ \frac{100}{8} {ms}^{ - 1} = v \\ \frac{25}{2} {ms}^{ - 1} = v \\ 12.5 {ms}^{ - 1 } = v$

therefore the velocity is

$12.5 {ms}^{ - 1}$

hope it helps.

Answer 2

Answer:

P = MV

i.e., V = P/M

V = 10/0.8 =  12.5m/s    (800g = 0.8kg)