A child is sitting on a swing which performs S.H.M. It has minimum and maximum heights from ground 0.75 ~cm and 2 ~m respectively. Its maximum speed will be [ g =10 m s ^2 ]

Step-by-step solution

Maximum potential energy is attained at the highest point which gets converted into kinetic energy at the lowest point. aligned & h =2-0.75=1.25 ~m & 1 2 mv ^2= mgh & v ^2=2 gh =2 10 1.25=25 & v =5 ~m / s aligned