Work Energy And Power Question 283
Question: A ball of mass m hits the floor making an angle 9 as shown in the figure. Ife is the coefficient of restitution, then which relation is true, for the velocity component before and after collision?
Options:
A) $ V^{1}\sin \theta ‘=Vsin\theta $
B) $ V^{1}\sin \theta ‘=-sin\theta $
C) $ V^{1}\cos \theta ‘=V\cos \theta $
D) $ V^{1}\cos \theta ‘=-V\cos \theta $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] As the floor exerts a force on the ball along the normal, & no force parallel to the surface, therefore the velocity component along the parallel to the floor remains constant.
$ Hence V sin \theta =V^{1} sin {{\theta }^{1}}. $
