Question

What is the difference between speed and velocity?

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

Answer 1

Speed is a scalar that measures the rate of motion without direction, while velocity is a vector that measures both rate and direction of motion. The correct answer to the question is D.

Step-by-step explanation:

The difference between speed and velocity is that speed is a scalar quantity that measures how fast an object moves, which means it only includes magnitude (how much) and doesn't account for direction.

In contrast, velocity is a vector quantity that not only measures the speed but also includes the direction in which an object is moving. The correct answer to the question is D. Velocity measures an object's rate and direction of motion, while speed measures the rate only.