Question

The height h from which a car of mass m has to fall to gain the kinetic energy equivalent to what it would have gained when moving with a horizontal velocity of (u + v) is given by

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

Answer 2

Loss in potential energy - Gain in kinetic energy

mgh = $\frac { 1 } { 2 }$ mv^1/2

h =

(Q here velocity is given as (u + v))