Question

Can the speed of a body be negative?

Answer 1

Scalar quantity:

1. A scalar quantity is defined as the physical quantity with only magnitude and no direction.
2. Such physical quantities can be described just by their numerical value without directions.
3. The addition of these physical quantities follows the simple rules of algebra, and here, only their magnitudes are added.

Explanation:

1. The distance traveled by the body is always positive.
2. It can be zero, but it can never be negative.
3. The time period for which the body is moving is also a positive quantity.
4. Speed is the ratio of two positive quantities.
5. Therefore, speed can never be negative.

No, a body's speed can never be negative because speed is a scalar quantity.