Q=A ball of mass 20 g hits a wall at an angle of 45o with a velocity of 15 m/s - Physics - Laws Of Motion

Question

Q=A ball of mass 20 g hits a wall at an angle of
45o with a velocity of 15 m/s If the ball rebound at
90o to the direction of incidence ,calculate the impulse
received by the ball

Panchali Dutta · Accepted Answer

Let the ball hit the wall making an angle of 45 with the
wall
After hitting the wall, the ball makes an angle of 90 with the
incident direction as shown in the figure
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/discuss_editlive/3079860/2012_07_06_15_48_45/wallandball(3)_1717913181690007061%20jpg">
Initial velocity be u
=> final velocity = -u
On resolving the inital and final veocity,
the cos components cancel each other whereas the sine components
add up,
change in momentum,Î”p = 2musin(45o)
= 0 42kgm/s

Q=A ball of mass 20 g hits a wall at an angle of 45o with a velocity of 15 m/s.If the ball rebound at 90o to the direction of incidence ,calculate the impulse received by the ball.

Q=A ball of mass 20 g hits a wall at an angle of 45^o with a velocity of 15 m/s.If the ball rebound at 90^o to the direction of incidence ,calculate the impulse received by the ball.