Question

Evaluate these two statement given; is it true or false statement. Explain why your answer. 1....

Evaluate these two statement given; is it true or false statement. Explain why your answer.

1. Elastic potential energy can be either positive, zero or negative

2. When a spring is stretched by 2 cm, it has more elastic potential energy than when it is compressed by 2 cm.

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Answer #1

1. Elastic potential energy is always either positive or zero, it cannot be negative.

Elastic potential energy = 1/2 kx^2

When spring is compressed, the compression force is opposite to the spring restoring force, when spring is elongated, the elongation force is again opposite to the restoring force, work is always done to either compress or stretch the spring. when there is no compression or stretch, the elastic potential energy is zero.

Statement is FALSE.

2. It is same = 1/2kx^2, x can be negative or positive.

FALSE

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