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A BALL OF 1 KG STRIKES A WALL WITH VELOCITY 1m/s AT AN ANGLE OF 60° WITH THE WALL AND REFLECTS AT THE SAME ANGLE . IF IT REMAINS IN CONTACT WITH WALL FOR 0.1 SEC,THEN THE FORCE IS ? N EXPLAIN WITH FULL METHOD...

A BALL OF 1 KG STRIKES A WALL WITH VELOCITY 1m/s AT AN ANGLE OF 60° WITH THE WALL AND REFLECTS AT THE SAME ANGLE . IF IT REMAINS IN CONTACT WITH WALL FOR 0.1 SEC,THEN THE FORCE IS ? N
EXPLAIN WITH FULL METHOD... 

Grade:9

1 Answers

Arun
25750 Points
5 years ago
Dear Ashok

F = (pcos 60° + p1cos 60°) t
F = (mv cos 60° + mvcos 60°)/t
  = (1 x 1 x 1/2 + 1 x 1 x 1/2)/ 0.1
  = (1/2 + 1/2)0.1
  = 1/0.1
  = 10 N
 
Regards Arun (askIitians forum ezpert)

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