Answers

2015-05-10T09:41:09+05:30
u = -6 m/s ( initial )
v = 4.4 m/s ( final ) 
t = 0.04 s 
a=?
  = v-u/t
  = 4.4-(-6)/0.04
  = 10.4/0.04 
  = 260 m/s² ( answer )
 
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2015-05-10T13:27:34+05:30
GIVEN ;-

⇒ Speed of Ball at which it hits the ball in horizontal way = 6.0 m / s

⇒ Speed of ball when the ball rebounds in horizontal       = 4.4. m / s

⇒ Time take by the ball for contact to wall is                  = 0.04 s

TO FIND  ;-

⇒ Acceleration of the ball = ?

SOL  ;-

Initial velocity of the ball =
6.0 m / s

Final velocity of the ball  = - 
4.4. m / s

Time taken by the ball     = 
0.04 s

Acceleration =  Final velocity - Initial velocity / Time taken

                   =  - 4.4 m / s      -         6. 0 m /s   /  0.04 s

                   =   10.4 m/ s         /       0.04 s
       
                   = 260 m / s² is the acceleration of the ball.
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