Question

how is speed calculated? speed multiplied by time. distance divided by time. displacement divided by time. displacement divided by velocity.

Explanation:

To determine how speed is calculated, we recall the basic formula for speed in physics. Speed is a scalar quantity that measures the rate of change of distance with respect to time. The formula for speed is \( \text{Speed} = \frac{\text{Distance}}{\text{Time}} \).

• The first option, "Speed multiplied by time," gives distance (since \( \text{Distance} = \text{Speed} \times \text{Time} \)), not the formula for calculating speed.
• The third option, "Displacement divided by time," is the formula for velocity (a vector quantity), not speed.
• The fourth option, "Displacement divided by velocity," is incorrect as it does not relate to the calculation of speed.

Only the second option, "Distance divided by time," matches the correct formula for calculating speed.

Answer:

B. Distance divided by time.