Momentum

Q.

Momentum is a measure of which quantity ?

1. motion

2. friction

3. gravitation

4. electric force

Q.

Prove the conservation of linear momentum for a head on collision of two bodies with the help of Newtons second law.

Q. What is the derivation of the SI unit of angular momentum

Q.

What is the difference between negative acceleration and deceleration?

Q.

What is momentum in real life?

Q.

What is momentum in simple language?

Q.

If a body in rest breaks up into two pieces of equal masses, then, the parts will

Q.

Choose the correct statement:

Statement 1: Momentum is the sum of mass and velocity.

Statement 2: Momentum is the measure of the impact produced by one object on the another.

Statement 3: Greater force is required to maintain a greater velocity.

Statement 4: Momentum is the product of mass and velocity.

1. All statements are correct
2. Only Statement 2 and 4 are correct
3. Statement 2, 3 and 4 are correct
4. Only statement 4 is correct

Q. The SI unit of momentum is:

1. $kgm{s}^{-2}$
2. $gm{s}^{-2}$
3. $kgm{s}^{-1}$
4. $gm{s}^{-1}$

Q.

Define the momentum of a body.

Q.

A $2\text{kg}$ ball moving straight down strikes the floor at $8{\text{ms}}^{-1}$. It rebounds upwards at $6{\text{ms}}^{-1}$. The change in the magnitude of momentum:

1. $28{\text{kg‐ms}}^{-1}$

2. $4{\text{kg‐ms}}^{-1}$

3. $2{\text{kg‐ms}}^{-1}$

4. $14{\text{kg‐ms}}^{-1}$

Q. A body initally travelling at $7m{s}^{-1}$, triples its speed. If the change in its momentum is $200kgm{s}^{-1}$, find the mass of the body.

1. $12.78kg$
2. $13.28kg$
3. $13.78kg$
4. $14.28kg$

Q. The property that remains constant when you apply the same force on stationary objects of different masses is

1. momentum
2. acceleration
3. velocity

Q.

How much momentum does a dumbbell of mass $10kg$ transfer to the floor if it falls from a height of $80cm$ (assume that the dumbbell stops after hitting the ground, and take $g=10m{s}^{-2}$)?

1. 40 kg m/s

2. 50 kg m/s

3. 35 kg m/s

4. 30 kg m/s

Q. The change in momentum of a body per unit time represents

1. Kinetic energy
2. Acceleration
3. Impulse
4. Resultant force

Q. A cannon ball of mass $500g$ is fired with a speed of $15m{s}^{-1}$. Find its momentum.

1. $7500kg$ $m$ $s^{-1}$
2. $3750kg$ $m$ $s^{-1}$
3. $7.5kg$ $m$ $s^{-1}$
4. $3.75kg$ $m$ $s^{-1}$

Q.

How is force related to the momentum of a body?

Q.

A body of mass $5$ kg is thrown vertically up from the ground with velocity $20$ $m/s$. What will be its momentum just before hitting the ground? Take upward direction as positive.

1. 100 Kg m/s
2. 0 Kg m/s
3. -100 Kg m/s
4. -20 Kg m/s

Q. A body moving with uniform velocity will be always in equilibrium. The statement is:

1. cannot say
2. false
3. true
4. ambiguous

Q. A stationary body accelerates at a rate of $1m{s}^{-2}$ for a distance of $18m$. If the body weighs $45kg$, find the final momentum of the body.

1. $180kgm{s}^{-1}$
2. $210kgm{s}^{-1}$
3. $240kgm{s}^{-1}$
4. $270kgm{s}^{-1}$

Q. A force $F_1$ accelerates a particle from rest to a velocity v. Another $F_2$ decelerates the same particle from v to rest, then:

1. $F_1$ is always equal to $F_2$
2. $F_2$ is greater than $F_1$
3. $F_2$ cannot be equal to $F_1$
4. $F_2$ may be smaller than, greater than or equal to $F_1$