Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

A body released from rest and allowed to fall freely from a given height under gravity. What is the magnitude of kinetic energy at its halfway point?
Options
A a little above half of its initial energy
B a little below half of its initial energy
C half of its initial energy
Correct Answer
D all of the above
Correct Answer

Option C is the correct answer.

Detailed Explanation

Initial energy is potential energy mgh. At halfway point, height is h/2, so potential energy is mgh/2. By conservation of energy, kinetic energy = initial total energy - potential energy = mgh - mgh/2 = mgh/2, exactly half of the initial potential energy.

Hint

Use conservation of mechanical energy.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 875 of 1250
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