A highly elastic ball moving at a speed of 3 m/s approaches a wall moving towards it with a speed of 3 m/s. After the collision, the speed of the ball will be
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a)
3 m/s
b)
6 m/s
c)
9 m/s
d)
Zero
a)
3 m/s
b)
6 m/s
c)
9 m/s
d)
Zero
Question ID - 100100 | SaraNextGen Top Answer A highly elastic ball moving at a speed of 3 m/s approaches a wall moving towards it with a speed of 3 m/s. After the collision, the speed of the ball will be
a)
3 m/s
b)
6 m/s
c)
9 m/s
d)
Zero
A highly elastic ball moving at a speed of 3 m/s approaches a wall moving towards it with a speed of 3 m/s. After the collision, the speed of the ball will be
|
a) |
3 m/s |
b) |
6 m/s |
c) |
9 m/s |
d) |
Zero |
1 Answer
127 votes
Answer Key / Explanation : (c) -
|
(c) For elastic collision, |
Let speed of the ball be 
towards left after collision, then w.r.t. wall, incident velocity = reflected velocity. We get 
127 votes
Answer Link
127