Two identical carts start simultaneously from rest at the same vertical height on two…
PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy
Problem
Two identical carts start simultaneously from rest at the same vertical height on two different smooth tracks that end at the same lower level. One track is a straight incline, while the other is a long winding path. Which of the following correctly compares their speeds when they reach the lower level?
(a) The cart on the straight track is faster because the path is shorter.
(b) Both carts have the same speed because their loss in potential energy mgh is identical.
(c) The cart on the winding track is faster because it is accelerated for a longer time.
(d) The comparison cannot be made without knowing the masses of the carts.