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 speed.
• The third option, "Displacement divided by time," gives velocity (a vector quantity), not speed.
• The fourth option, "Displacement divided by velocity," is not a valid formula for calculating speed.
• The second option, "Distance divided by time," matches the definition of speed.

Answer:

B. Distance divided by time.