Kinematics Ques 3
- Two balls of different masses are thrown vertically upwards with the same speed. They pass through the point of projection in their downward motion with the same speed (Neglect air resistance).
(1983, 2M)
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Answer:
Correct Answer: 3.( T )
Solution:
Formula:
- Acceleration due to gravity is independent of the mass of the body.
From diagram, angle $\theta$ is $ \sin \theta=\frac{v_r}{v_{s r}}=\frac{2 \mathrm{~km} / \mathrm{h}}{4 \mathrm{~km} / \mathrm{h}}=\frac{1}{2} \Rightarrow \theta=30^{\circ} $
Clearly, $\quad \alpha=90^{\circ}+30^{\circ}=120^{\circ}$
BETA
