Question

A ball of mass 4 kg is pressed against a spring and released vertically with a velocity of 5 m/s. If 20% of the energy is lost in overcoming air friction then the maximum height attained by the ball is:
1.25 m
1.75 m
1 m
2 m

Answer 1

Answer:

h=1 m

Explanation:

KE=1/2×m×v²

=)40

PE=mgh

kindly refer the pic