Question

A car of mass 3000kg travelling at 54km/h in a straight road is brought to rest in a distance of 100m by the application of brakes.Calculate the workdone

Answer 1

Answer:

Given :-

Mass of the body = 5 kg

Velocity of the body = 2 m/s

To Find :-

The linear momentum of the body.

Analysis :-

Here we are given with the mass and velocity of the body moving.

In order to find the linear momentum substitute the given values from the question such that linear momentum is equal to mass multiplied by the velocity of the body moving.

Solution :-

We know that,

p = Momentum

m = Mass

v = Velocity

Using the formula,

$\underline{\boxed{\sf Momentum=Mass \times Velocity}}$

Given that,

Mass (m) = 5 kg

Velocity (v) = 2 m/s

Substituting their values,

⇒ p = mv

⇒ p = 5 × 2

⇒ p = 10 kg m/s

Therefore, the linear momentum of the body is 10 kg m/s.