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Physics-

General

Easy

Question

A small roller coaster starts at point A with a speed $u blank$ on a curved track as shown in the figure.
The friction between the roller coaster and the track is negligible and it always remains in contact with the track. The speed of roller coaster at point $D blank$ on the track will be

${(u^{2} + g h)}^{1 / 2}$
${(u^{2} + 2 g h)}^{1 / 2}$
${(u^{2} + 4 g h)}^{1 / 2}$
$u$

The correct answer is: $u$

There is no loss of energy. Therefore, the final velocity is the same as the initial velocity.
Hence, The speed of roller coaster at point D is $u$

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