Physics · JEE

Law of conservation of linear momentum and its applications, equilibrium of concurrent forces Short Tricks for JEE

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Short tricks for Law of conservation of linear momentum and its applications, equilibrium of concurrent forces work only with strong fundamentals. Apply the tips below in timed sets and review every explanation.

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Law of conservation of linear momentum and its applications, equilibrium of concurrent forces focus drill
Solve 15 mixed MCQs for Law of conservation of linear momentum and its applications, equilibrium of concurrent forces, review every explanation, and note formulas you hesitated on.
Dimensional check first
Before solving, verify each term has consistent SI dimensions — eliminates wrong options quickly in JEE MCQs.
Limiting cases
Substitute extreme values (t→0, m→∞, θ→0) to sanity-check your final expression.

Syllabus context

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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Frequently asked questions

Are short tricks enough for Law of conservation of linear momentum and its applications, equilibrium of concurrent forces in JEE?

No — tricks complement concepts. Master the theory first, then use shortcuts in timed MCQ practice.

Short tricks for speed

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Are short tricks enough for Law of conservation of linear momentum and its applications, equilibrium of concurrent forces in JEE?

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