- #1
DeathKnight
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Guys I'm having a little problem in undersatnding a few things:
We have a wall and a ball of mass 'm'. The ball is thrown towards the wall with speed u and rebounds with speed 'v'. The coefficient of restitution is, e is 1/3. The question is to find the value of 'v'.
Thats how I think it should be solved:
mu=mv (since the final velocity of the wall is "CONSIDERED" zero)
=> u=v
Now if I apply Newton's law of restitution and simplify:
v=-eu (putting this into u=v gives us)
u=-eu
cancelling u gives e=-1 but e=1/3. Where did I go wrong? I just can't understand it.
Any help will be greatly appreciated.
We have a wall and a ball of mass 'm'. The ball is thrown towards the wall with speed u and rebounds with speed 'v'. The coefficient of restitution is, e is 1/3. The question is to find the value of 'v'.
Thats how I think it should be solved:
mu=mv (since the final velocity of the wall is "CONSIDERED" zero)
=> u=v
Now if I apply Newton's law of restitution and simplify:
v=-eu (putting this into u=v gives us)
u=-eu
cancelling u gives e=-1 but e=1/3. Where did I go wrong? I just can't understand it.
Any help will be greatly appreciated.
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