Question

Which of the following is true about the value of acceleration?

• A. It is always negative.
• B. It is always positive.
• C. It can be positive, negative, or zero.
• D. It is always equal to zero.

Answer 1

The correct option is C It can be positive, negative, or zero.

A vector quantity has both magnitude and direction. Vector quantities can have positive, negative, or zero values.
The acceleration of a body is the amount of change in the velocity of the body with time. It is a vector quantity, and hence acceleration of a body can be positive, negative or zero.

• When it is positive, the body's velocity is increasing with time.
• When it is negative, the body's velocity is decreasing with time.
• When it is zero, the body's velocity is not changing with time.