Question

A ball of mass 50 g is thrown upwards. It rises to a maximum height of 100 m. At what height its KE is reduced to 70%?
30 m
40 m
60 m
o
7 m​

Answer 1

Answer:

At mid point i.e at 50 m both K.E. and P.E. are equal when the ball gets above 50 m the K.E. start to get reduced at 70 m high the K.E. remains 30% and P.E. is at 70%.

The ans is 70 m.