A ball strikes a horizontal floor at an angle 
. The coefficient of restitution between the ball and the floor is 
. The fraction of its kinetic energy lost in collision in
a)
5/8
b)
3/8
c)
3/4
d)
1/4
A ball strikes a horizontal floor at an angle . The coefficient of restitution between the ball and the floor is . The fraction of its kinetic energy lost in collision in
a)
5/8
b)
3/8
c)
3/4
d)
1/4
Question ID - 53158 | SaraNextGen Top Answer
A ball strikes a horizontal floor at an angle . The coefficient of restitution between the ball and the floor is . The fraction of its kinetic energy lost in collision in
a)
5/8
b)
3/8
c)
3/4
d)
1/4
|
A ball strikes a horizontal floor at an angle |
|||||||
|
a) |
5/8 |
b) |
3/8 |
c) |
3/4 |
d) |
1/4 |
1 Answer
127 votes
Answer Key / Explanation : (b) -
|
(b) Let ball strikes at a speed Due to collision tangential component of velocity remains unchanged at
Hence final kinetic energy
|
the 
sin 45
, but the normal component of velocity change to 
sin45
Final velocity of ball after collision
.
Fractional loss in KE
127 votes
Answer Link
127