99 Percentile Qs Bank for JEE MainPhysicsMotion in One Dimension
A body is released from a great height falls freely towards the earth. Another body is released from the same height exactly a second later. Then the separation between two bodies, 2 s after the release of the second body is, nearly
Options
- A15 m
- B20 m
- C25 m
- D30 m
Correct answer
C. 25 m
Step-by-step solution
s = u t + 1 2 a t 2 For Ist body u = 0 a n d a = g f r e e l y f a l l i n g b o d y Distance covered in 2 s, s 1 = 0 + 1 2 g 3 2 For IInd body Distance covered in 2 s, s 2 = 0 + 1 2 g 2 2 ∴ s 1 - s 2 = 1 2 g 3 2 - 2 2 = 1 2 g 9 - 4 = 25 m