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Question

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

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

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.

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