When an object is shot from the bottom of a long, smooth inclined plane kept at an angle of $$60^\circ$$ with horizontal, it can travel a distance $$x_1$$ along the plane. But when the inclination is decreased to $$30^\circ$$ and the same object is shot with the same velocity, it can travel $$x_2$$ distance. Then $$x_1:x_2$$ will be:
1. $$1:2\sqrt{3}$$
2. $$1:\sqrt{2}$$
3. $$\sqrt{2}:1$$
4. $$1:\sqrt{3}$$

Subtopic: Â Conservation of Mechanical Energy |
Â 73%
From NCERT
NEET - 2019
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A ball is dropped from a height of $$5$$ m. If it rebounds up to a height of $$1.8$$ m, then the ratio of velocities of the ball after and before the rebound will be:
1. $\frac{3}{5}$

2. $\frac{2}{5}$

3. $\frac{1}{5}$

4. $\frac{4}{5}$

Subtopic: Â Conservation of Mechanical Energy |
Â 74%
From NCERT
AIPMT - 1998
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