Non Contact Collision

Q. In the given figure, a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table.The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up with speeds $v_1=0.630m/s$ and $v_2=1.40m/s$ (Fig b). Neglecting the material removed from block 1 by the bullet, then

1. the speed of the bullet as it leaves the block 1 is 720 m/s
2. the speed of the bullet as it leaves the block 1 is 360 m/s
3. the speed of the bullet as it enters the block 1 is 936 m/s
4. the speed of the bullet as it enters the block 1 is 1355 m/s

Q.

A ball of mass 0.50 kg moving at a speed of 5.0 $\frac{m}{s}$ collides with another ball of mass 1.0 kg .After the collision the balls stick together and remain motionless.What was the velocity of the 1.0 kg block before the collision?

Q. Two spheres of masses, $20\text{g}$ and $40\text{g}$ are moving on a straight frictionless path in the same direction with velocities of $3\text{m/s}$ and $2\text{m/s}$ respectively. They collide with each other and after collision, the sphere of mass $20\text{g}$ moves with a velocity of $2.5\text{m/s}$ in the same direction as before collision. Find the velocity of the second ball after collision.

1. $4.25\text{m/s}$
2. $3.25\text{m/s}$
3. $5.25\text{m/s}$
4. $2.25\text{m/s}$

Q.

Two solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

1. 1.5 m/sec

2. 0.15 m/sec

3. - 0.15 m/sec

4. None of the above

Q. In head on elastic collision of two bodies of equal masses:

1. the speeds are interchanged
2. the faster body slows down and the slower body speeds up
3. the momentum are interchanged
4. the velocities are interchanged

Q. Two solid rubber balls $A$ and $B$ having masses $200$ grams and $400$ grams are moving in opposite directions with velocity of $A$ equal to $0.3m/s$. After collision the two balls come to rest, then the velocity of $B$ is

1. $0.15m/s$
2. $-0.15m/s$
3. $1.5m/s$
4. None

Q.

Two solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

1. 0.15 m/sec

2. 1.5 m/sec

3. -0.15 m/sec

4. None of the above

Q.

Two solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

1. 0.15 m/sec

2. 1.5 m/sec

3. -0.15 m/sec

4. None of the above

Q. Two balls of masses $1\text{kg}$ and $2\text{kg}$ moves towards each other. If they come to rest after colliding, then what was the speed of $1\text{kg}$ ball before collision?

Speed of the $2\text{kg}$ ball before collision was $8\text{m/s}$.

1. $4\text{m/s}$
2. $16\text{m/s}$
3. $8\text{m/s}$
4. $20\text{m/s}$

Q.

Two solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity of A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

1. 0.15 m/sec

2. 1.5 m/sec

3. -0.15 m/sec

4. None of the above