A moving block having mass $$m$$ collides with another stationary block having a mass of $$4m.$$ The lighter block comes to rest after the collision. When the initial velocity of the lighter block is $$v,$$ then the value of the coefficient of restitution $$(e)$$ will be:
1. $$0.5$$
2. $$0.25$$
3. $$0.8$$
4. $$0.4$$

Subtopic: Â Collisions |
Â 78%
From NCERT
NEET - 2018
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two identical balls $$\mathrm{A}$$ and $$\mathrm{B}$$ having velocities of $$0.5~\text{m/s}$$ and $$-0.3~\text{m/s}$$ respectively collide elastically in one dimension. The velocities of $$\mathrm{B}$$ and $$\mathrm{A}$$ after the collision respectively will be:
1. $$-0.5 ~\text{m/s}~\text{and}~0.3~\text{m/s}$$
2. $$0.5 ~\text{m/s}~\text{and}~-0.3~\text{m/s}$$
3. $$-0.3 ~\text{m/s}~\text{and}~0.5~\text{m/s}$$
4. $$0.3 ~\text{m/s}~\text{and}~0.5~\text{m/s}$$

Subtopic: Â Collisions |
Â 57%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A bullet of mass $$10$$ g moving horizontal with a velocity of $$400$$ m/s strikes a wood block of mass $$2$$ kg which is suspended by light inextensible string of length $$5$$ m. As a result, the centre of gravity of the block is found to rise a vertical distance of $$10$$ cm. The speed of the bullet after it emerges horizontally from the block will be:

 1 $$100$$ m/s 2 $$80$$ m/s 3 $$120$$ m/s 4 $$160$$ m/s
Subtopic: Â Collisions |
Â 59%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two identical balls $$A$$ and $$B$$ having velocities of $$0.5~\text{m/s}$$ and $$-0.3~\text{m/s}$$, respectively, collide elastically in one dimension. The velocities of $$B$$ and $$A$$ after the collision, respectively, will be:

 1 $$-0.5~\text{m/s}~\text{and}~0.3~\text{m/s}$$ 2 $$0.5~\text{m/s}~\text{and}~-0.3~\text{m/s}$$ 3 $$-0.3~\text{m/s}~\text{and}~0.5~\text{m/s}$$ 4 $$0.3~\text{m/s}~\text{and}~0.5~\text{m/s}$$
Subtopic: Â Collisions |
Â 61%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints