Question

A toy car of mass m starts from rest at the top of a hill and
moves down the curved track the speed of toy car when it
reaches the bottom is
[Consider friction between car and slope is negligible]​

Answer 1

A ball can slip on a surface, can roll, or both. A ball slipping on a surface is decelerated by the friction force opposing the ball linear displacement. The friction force provides also angular momentum to the ball, which starts rotating until it rolls on the surface without slipping.

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Answer 2

$\huge\underbrace\mathfrak \red{ANSWER }$

A ball can slip on a surface, can roll, or both. A ball slipping on a surface is decelerated by the friction force opposing the ball linear displacement. The friction force provides also angular momentum to the ball, which starts rotating until it rolls on the surface without slipping.

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