Why things do not stops immediately when a retarding force is applied on a moving ball.
- I know this is a foolish question but I have tried to give the answer
- my attempt : suppose I have applied force on a moving ball(its moving on a non frictional plane) and I want to stop it immediately means at a time = 0.
- F = m.a(this is a retarding force applied on ball and 'a' is the constant deaccelaration due to force on a ball )
- a = dv/dt , adt = dv , suppose initial velocity of a ball is 0.
- ∫a dt = ∫dv , lower limit and uppar limit for velocity is 0 and v and for time 0 and t
- Therefore v = at , to get immediate stop, t =0 , in that case a = ∞ , and F = ma , ∴F = ∞ , but it is impossible to apply infinite force. Therefore it is impossible to stop things immediately.
- What's your answer or opinion