Teaching HTET PGT Level 3 - 2024 Mock Test Physics Work Power and Energy Conservation of Mechanical Energy
A small ball of mass m attached to an inextensible massless string of length L is released from pont P when the string makes an angle of 60° with the verticle as shown in the figure. At the bottommost point Q, it strikes elastically with another identical small ball B of mass m. The surface is rough and has coefficient of friction μ = 0.2. Then after collision, the correct statement is - (Assume the balls are of negligible size and are particles)
1
Ball B will come to rest after traveling a distance of 5L/2 and ball A will go beyond point B but with reduced speed.
2
Ball A will return back to point A and ball B will move a distance L/2.
3
Ball A will come to rest and ball B will travel a distance of 5L/2 before coming to rest.
4
None of the above.