Speed, velocity, acceleration and inertia

Mariah rides the escalator three floors up and then turns right to get to her favorite store in the mall.

• Speed
• Velocity
• Acceleration

Speed = _______________

• Distance + time

• Distance – time

• Distance x time

• Distance / time

Tags

NGSS.MS-PS3-1

This occurs when an object speeds up, slows down, or changes direction.

• Speed

• Velocity

• Acceleration

Velocity = _______________

• Speed – direction

• Speed + direction

• Speed x direction

• Speed / direction

Avery likes to walk 30 feet in 10 seconds. What is her speed?

• 3 feet/sec
• 6 feet/sec
• 10 feet/sec
• 2 feet/sec

Tags

NGSS.MS-PS3-1

If you slow down on your bicycle, you accelerate.

• TRUE
• FALSE

Tags

NGSS.MS-PS2-2

A train travels 225 kilometers in 2.5 hours. Calculate the train's speed.

• 95 mph

• 90 km/h

• 90 h/km

• 90 m/s

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

  velocity over time.

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

  direction.

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

  direction.

• Velocity is the change in speed over time, while speed is the change in

  distance over time.

A car travels 100km. The journey takes two hours. The highest speed of the car is 80km/ h, and the lowest speed is 40km/ h. What is the average speed for the journey?

• 40km/ h

• 50km/ h

• 60km/ h

• 120km/ h

An athlete runs at a speed of 8 m / s for 10 s, and then at a speed of 6 m / s for 12s. Which calculation gives the average speed of the athlete in m / s?