Question

A bal of mass m is moving over a fixed smooth
track as shown. The velocity of ball at point A is u
and that on point B is v. If h, and he are the heights
of points A and B respectively above the ground,
then
(1) If he = hg, then v > u
(2) If ha > hg, then u < v
(3) If he <hg, then v > u
(4) If ha > hg, then u > v​

Answer 1

Explanation:

and that on point B is v. If h, and he are the heights

of points A and B respectively above the ground,

then

(1) If he = hg, then v > u

(2) If ha > hg, then u < v

(3) If he <hg, then v > u

(4) If ha > hg, then