Question

The calorific value of petrol and cng are 45,000 KJ/Kg and 50,000 kg/kj, respectively.
If have vehicle which can run on petrol as well as cng, which fuel will you prefer and why?

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.