Physics Quiz 6 - Projectile Motion (Velocity)

A train travels from SF to LA. The distance is 500 kilometers and the trip takes 5 hours. What is the train’s average speed (in km/hr) over the course of the trip?

• 100

• 2500

• 200

• 505

Average speed is calculated by dividing distance traveled by time. How is average velocity calculated?

• displacement divided by time

• time divided by displacement

• velocity divided by acceleration

• none of the above

An object on a number line moved from x = 15 cm to x = 65 cm and then moved back to x = 25 cm, all in a time of 10 seconds. What was the object's total displacement?

• 10 cm to the right

• 10 cm

• 90 cm

• 50 cm to the right

An object on a number line moved from x = 15 cm to x = 65 cm and then moved back to x = 25 cm, all in a time of 10 seconds. What was the object's average speed?

(Hint: Speed = Distance / time)

• 90 cm / 10 seconds = 9 cm / second

• 65 cm / 10 seconds = 6.5 cm / second

• 15 cm X 10 seconds = 150 cm / second

• 65 cm - 15 cm = 40 cm

An object on a number line moved from x = 15 cm to x = 65 cm and then moved back to x = 25 cm, all in a time of 10 seconds. What was the object's average velocity?

(Hint: Velocity = displacement / time)

• 90 cm / 10 seconds = 9 cm / second

• 10 cm to the right / 10 seconds = 1 cm / second to the right

• 10 cm to the right / 10 seconds = 1 cm / second

• 65 cm to the right / 10 seconds = 6.5 cm / second to the right