MCQ
A ball is dropped downwards. After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds
- ✓$25 m$
- B$20 m$
- C$50 m$
- D$9.8 m$
✓
Answer
Correct option: A.
$25 m$
(a) Distance between the balls = Distance travelled by first ball in3secondsDistancetravelled by second ball in 2 seconds$=\frac{1}{2} g(3)^2-\frac{1}{2} g(2)^2=45-20=25 \mathrm{~m}$
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