Question

When a bullet is fired from a rifle its momentum become 20 kg m/s. If the velocity of the bullet is 1000m/s what will be its mass?

Answer 1

Given

Momentum (p) = 20 kg m/s

Velocity (v) = 1000m/s

Mass (m) = ?

★ Momentum (p) = Mass (m) x Velocity (v)

→ 20 kg m/s = m × 1000m/s

→ m = 20 /1000

→ m = 0.02 kg =20 g

Mass of the bullet = 20 g

Answer 2

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Riku8642

sowbesh9142

11.02.2019

Physics

Secondary School

+13 pts

Answered

When a bullet is fired from a rifle its momentum become 20 kg m/s. If the velocity of the bullet is 1000 m/s what will be its mass?

atulrajcool

atulrajcool

There is no force acting on it so we can apply conservative of momentum here .

20=1000×m

m=20/1000=0.02kg.

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handgunmaine

The mass of the bullet is 0.02 kg.

Explanation:

Given that,

Momentum of the bullet when it is fired from a rifle is 20 kg-m/s. The velocity of the bullet is 1000 m/s.

To find,

Mass of the bullet.

Solution,

Momentum of an object is given by :

p = mv

m is the mass of the object

v is the speed of object

m=\dfrac{p}{v}

m=\dfrac{20\ kg-m/s}{1000\ m/s}

m = 0.02 kg

So, the mass of the bullet is 0.02 kg.