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Hard Law of conservation of linear momentum and its applications, equilibrium of concurrent forces MCQs for JEE

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Part of Laws of Motion in JEE Main Physics.

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Q1PhysicsUnit 3: Laws of Motion

A machine gun fires a bullet of mass

65 g

with a velocity of

1300 m / s

. The man holding it can exert a maximum force of

169 N

on the gun. The number of bullets he can fire per second will be

Q2PhysicsUnit 3: Laws of Motion

Two bodies

A

and

B

, moving in the same direction collide and after collision, move with the common velocity in the direction of

\mathbf{A}

Q3PhysicsUnit 3: Laws of Motion

A machine gun fires 10 bullets/s, each of mass

10 g

, the speed of each bullet is

20 c m / s,

then force of recoil is

Q4PhysicsUnit 3: Laws of Motion

A particle of mass

m

moving with a velocity

(3 \hat{i}+2 \hat{j}) m s^{-1}

collides with another body of mass

M

and finally moves with velocity

(-2 \hat{i}+\hat{j}) m s^{-1} .

Then during the collision: This question has multiple correct options

Q5PhysicsUnit 3: Laws of Motion

A Diwali rocket is ejecting

0.05 k g

of gases per second at a velocity of

400 m s^{-1} .

The repulsive force on the rocket is

Q6PhysicsUnit 3: Laws of Motion

A student initially at rest on a frictionless frozen pond throws a

2 \mathrm{kg}

hammer in one direction. After the throw, the hammer moves off in one direction while the student moves in the other direction.Then:

Q7PhysicsUnit 3: Laws of Motion

A body subjected to three concurrent forces is found to be in equilibrium. The resultant of any two forces then will be

Q8PhysicsUnit 3: Laws of Motion

Bullets of mass

40 g

each are fired from a machine gun with a velocity of

10^{3} m / s .

If the person firing the bullets experience an average force of

200 N

then the number of bullets fired per minute will be:

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