Speed acceleration and velocity scenarios 8.6B

1. A blitzing linebacker approaches an unsuspecting quarterback at a speed of 3.0 m/s. The quarterback is approximately 8 m away. How long does the quarterback have until he is pummeled by the linebacker?

• 3.3 sec

• 2.66 sec

• 2.0 sec

• 30 sec

Ian “the Thorpedo” Thorpe can swim a distance of 100 m in 42 s. What is his average speed?

• 12m/sec

• 3333m/hr

• 2.38m/sec

• 3.33m/sec

Which statement best describes the motion of the toy during the first 30 seconds of the investigation?

• The toy moved in a circular motion

• Unable to determine without more information

• The toy moved at a constant speed

• The toy moved in a straight line

Tags

NGSS.MS-PS3-1

1. At an average speed of 4.2 m/s, how long will it take Olympic champion Michael Johnson to run 400 m?

• 37 sec

• 2 min

• 95.2 sec

• 33.65 sec

If the average speed of a car is 110 km/h, how long will it take for the car to travel 715 km?

• 12h

• 14h

• 6.5h

• 33m

Which statement best describes the cart?

• More information is needed.

• The cart moves for 3 seconds then stops.

• The cart was stationary for the entire 7 seconds.

• The cart moves at a constant velocity of 0.5m/s for the entire 7 seconds.

Tags

NGSS.MS-PS3-1

Which of the following best describes the velocity of an object?

• 30m/s

• 30m east

• 30m/s east

• 30m/s²

Tags

NGSS.MS-PS3-1

What is the difference between the velocity and the speed of an object?

• Velocity is the change in distance over time while speed is the change in velocity over time.

• Velocity has direction associated with it, while speed has no specific direction.

• Velocity has no direction associated with it while speed has a direction.

• They are the same.

The pickup truck has a changing velocity because:

• It accelerates faster than the other vehicles.

• It is traveling in the opposite direction of the other cars.

• It is traveling in a curve (changing directions).

• It needs more force to move.

Tags

NGSS.MS-PS2-2

A trip to Cape Canaveral, Florida takes 10 hours. The distance is 816 km. Calculate the average speed.

• 11 Km/hr

• 81.6 Km/h

• 34 km/h

• 12 hours