Motion

Which statement BEST describes the position/time graph?

• The object accelerates, stops, then decelerates.

• The object travels at a constant speed during this time period.

• The object moves faster on the way out, but much slower on the way back.

• The object is moving away, coming to a stop, and then moving back to the reference point.

Tags

NGSS.MS-PS3-1

What is the motorcycle's average speed, in kilometers per minute, over the first 5 minutes?

• 7 km/min

• 6 km/min

• 30 km/min

• 1/6 km/min

Tags

NGSS.MS-PS3-1

What do velocity and acceleration have in common?

• Velocity and acceleration do not have direction.

• Velocity and acceleration have direction.

• Velocity and acceleration are the same thing, rate of change in displacement.

• Velocity and acceleration can't have negative values.

What is the value of the acceleration of the object whose velocity/time graph is shown?

• 10 m/s^2

• 15 m/s^2

• -10 m/s^2

• -15 m/s^2

Tags

NGSS.HS-PS2-1

Which statement BEST describes acceleration?

• Acceleration is always positive.

• Acceleration is the rate of change in displacement.

• Acceleration only changes when an object speeds up or slows down.

• Acceleration measures how much velocity changes over time.

Describe the motion of the object according to the blue line in the graph.

• The object moves forward, then stops.

• The object speeds up, then moves at a constant velocity.

• The object never accelerates according to the graph.

Tags

NGSS.MS-PS3-1

True or False: An object displays acceleration when it changes directions.

• True

• False

Which statement correctly describes the object that is accelerating?

• Object C is accelerating since the slope is negative.

• Object B is accelerating at a constant rate in the positive direction.

• Object A is accelerating since the curved line indicates varying velocity.

• Object A is accelerating since the displacement changes over time.

Tags

NGSS.MS-PS3-1

The distance a toy car travels over time is shown in the graph. Which table best shows the average speed of the toy car at different time intervals?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-1

A bus travels 20 km in 30 minutes. What is the average speed of the bus?

• 20 km/h

• 30 km/h

• 40 km/h

• 50 km/h