Question

Kinetic energy of a particle may be
(1) Positive
(2) Zero
(3) Negative
(4) Both (1) & (2)
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Answer 1

The kinetic energy is either zero or positive but cannot be negative

Option d is correct.

Answer 2

Kinetic energy of a particle may be

(1) Positive

(2) Zero

(3) Negative

(4) Both (1) & (2)

ANSWER:-

• Both (1) & (2) is the correct option.

EXPLANATION:-

• Kinetic energy is interpreted as the work required to accelerate a body of a given mass from rest to its stated velocity.

• Kinetic energy must always be either zero or a positive value because velocity can have a positive or negative value but the square of velocity is always positive and Kinetic energy is not a vector.

• This kinetic energy is interpreted as half an object's mass which is multiplied by its velocity squared. As the mass is a measure of matter, it can never be negative and velocity is always positive because it is squared. Hence, the Kinetic energy of a particle may be Positive or Zero

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