Physics-
General
Easy
Question
A box of mass m is released from rest at position 1 on the frictionless curved track shown. It slides a distance d along the track in time t to reach position 2, dropping a vertical distance h. Let v and a be the instantaneous speed and instantaneous acceleration, respectively, of the box at position 2. Which of the following equations is valid for this situation?
- h = vt
- h = (1/2)gt2
- d = (1/2)at2
- mgh = (1/2)mv2
The correct answer is: mgh = (1/2)mv2
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