Understanding Motion in Sports

What is the primary difference between speed and velocity?

• Speed is a vector quantity, while velocity is a scalar quantity.

• Speed is a scalar quantity, while velocity is a vector quantity.

• Speed includes direction, while velocity does not.

• Speed and velocity are the same.

If a runner accelerates from rest to a speed of 10 m/s in 5 seconds, what is their acceleration?

• 0.5 m/s²

• 2 m/s²

• 5 m/s²

• 10 m/s²

Which of the following best describes acceleration?

• A decrease in speed over time.

• A change in velocity over time.

• A constant speed over time.

• A change in direction.

Which of the following best describes deceleration?

• An increase in speed over time.

• A decrease in speed over time.

• A constant speed over time.

• A change in direction.

A cyclist travels 15 miles north in 1 hour. What is their average velocity?

• 15 miles/hour

• 15 miles/hour north

• 1 mile/hour

• 1 mile/hour north

What is the momentum of a 70 kg football player running at a velocity of 8 m/s?

• 560 kg·m/s

• 560 m/s

• 70 kg·m/s

• 8 kg·m/s

If a car decelerates from 20 m/s to 0 m/s in 4 seconds, what is its deceleration?

• 5 m/s²

• 10 m/s²

• 20 m/s²

• 4 m/s²

Which of the following units is used to measure speed?

• m/s²

• m/s

• kg·m/s

• N

A sprinter runs 100 metres in 10 seconds. What is their average speed?

• 10 m/s

• 100 m/s

• 0.1 m/s

• 1 m/s

If a ball is thrown upwards with an initial velocity of 15 m/s, what is its velocity at the highest point?

• 15 m/s

• 0 m/s

• 9.8 m/s

• -15 m/s