Question

The two measurements necessary for calculating average speed are…A. Acceleration and Time B. Velocity and Time C. Distance and Time D. Distance and AccelerationE. Displacement and Time

Answer 1

Average speed is calculated using the measurements of distance and time, making option C the correct answer. Speed is a scalar quantity and should not be confused with velocity, which includes direction.

Step-by-step explanation:

The two measurements necessary for calculating average speed are distance and time. Thus, the correct answer to the question is C. Distance and Time. Average speed is defined as the total distance traveled divided by the elapsed time. When we express this mathematically, average speed is calculated using the formula:

Average speed = Total distance traveled / Elapsed time

It is important to note that speed is a scalar quantity, meaning it does not have a direction associated with it, while velocity is a vector quantity, which includes both magnitude and direction.

Answer 2

C. Distance and Time

Step-by-step explanation:

Speed is defined as the distance covered per unit of time. It is a scalar quantity and as such expressed in scalar terms. When we talk about speed, the direction of motion does not matter. We only try to find the rate at which a body moves with time.

It is expressed as:

Speed =
`(Distance covered)/(Time taken)`

The SI unit of speed is m/s or ms⁻¹