Understanding Speed and Velocity

What is the main difference between speed and velocity?

• Velocity is a scalar quantity, speed is not.

• Speed includes direction, velocity does not.

• Velocity includes direction, speed does not.

• Speed is a vector quantity, velocity is not.

If two cars are moving at the same speed but in different directions, what can be said about their velocities?

• Their velocities are different.

• Their velocities are the same.

• Their velocities depend on their masses.

• Their velocities depend on their acceleration.

Why is calculating speed and velocity on a circular track considered complex?

• Because the time taken is not constant.

• Because the speed changes constantly.

• Because the direction of movement changes constantly.

• Because the track is not uniform.

How is average speed calculated?

• By dividing total time by total distance.

• By dividing total velocity by total time.

• By dividing total distance by total time.

• By dividing total displacement by total time.

In the example of the athlete on a circular track, what is the average velocity if the displacement is 140 meters and the time is 20 seconds?

• 11 meters per second

• 7 meters per second

• 14 meters per second

• 10 meters per second