Question

A boy of mass 40kg while running develops a momentum of 180Ns. Calculate the velocity of the boy​

Answer 1

`\boxed {\boxed {\sf v= 4.5 \ m/s}}`

Step-by-step explanation:

The formula for momentum is:

`p=mv`

(p is momentum, m is mass, and v is velocity)

Let's rearrange the formula for velocity, or v.

`(p)/(m) =v`

Velocity can be found by dividing the momentum by the mass.

The momentum is 180 kilograms meter per second. The mass of the boy is 40 kilograms.

`p=180 \ kg*m/s \\m=40 kg`

Substitute the values into the formula.

`v=(180 \ kg*m/s)/(40 \ kg)`

Divide. Note that the kilograms or "kg" will cancel each other out.

`v=(180 \ m/s)/(40 )`

`v= 4.5 \ m/s`

The velocity of the boy is 4.5 meters per second.