A) Solid sphere
B) Hollow sphere
C) Both sphere simultaneously
D) We cannot say because masses of spheres are not given
Correct Answer: C
Solution :
| Both spheres reach the ground due to vertical component of velocity. As initial component of velocity of both spheres is zero, therefore both will reach the earth simultaneously. The time taken being given by |
| \[h={{u}_{y}}t+\frac{1}{2}g{{t}^{2}}=0+\frac{1}{2}g{{t}^{2}}\] |
| \[\Rightarrow \] \[t=\sqrt{\frac{2h}{g}}\] |
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