Question

What is the difference between speed and velocity? A. Velocity and speed both measure an object's change in position, but velocity only depends upon the object's speed. B. Speed measures an object's change in position, while velocity measures an object's change in position per unit time. C. Velocity measures an object's rate and direction of motion, and speed measures rate only. D. Speed measures an object's change in position per unit time, while velocity measures an object's change in speed per unit time.

Answer 1

C. Velocity measures an object's rate and direction of motion, and speed measures rate only.

Velocity is a vector quantity that includes both the speed (magnitude or numerical value of the rate of motion) and direction of motion. On the other hand, speed is a scalar quantity that only measures the numerical value of the rate of motion. In other words, velocity gives us information about the object's speed and the direction in which it is moving, while speed only tells us how fast the object is moving, without any information about the direction.