Kinematics Question 213
Question: 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 [BHU 1998]
Options:
A) 25 m
B) 20 m
C) 50 m
D) 9.8 m
Show Answer
Answer:
Correct Answer: A
Solution:
distance between the balls = distance travelled by first ball in 3 seconds
distance travelled by second ball in 2 seconds = $ \frac{1}{2}g\ {{(3)}^{2}}-\frac{1}{2}g\ {{(2)}^{2}}=45-20=25\ m $
