U2.17 Checkpoint #4

Which of the following best defines acceleration?

• The speed of an object in a specific direction.

• The rate at which an object's velocity changes.

• The distance an object travels over time.

• An object's resistance to a change in motion.

Tags

NGSS.MS-PS2-2

Which of these is an example of acceleration?

• A car sitting parked in a driveway.

• A train moving at a constant speed of 80 km/h on a straight track.

• A student walking at a steady pace of 1 m/s down a hallway.

• A cyclist slowing down as they approach a stop sign.

A race car is driving around a circular track at a constant speed of 150 mph. Which statement accurately describes the car's motion?

• The car is not accelerating because its speed is constant.

• The car is accelerating because its direction is constantly changing.

• The car is only accelerating at the start and finish line.

• The car's velocity is constant.

This graph shows the motion of a skateboarder. During which time interval is the skateboarder experiencing positive acceleration (speeding up)?

• 0 s to 14 s

• 14 s to 44 s

• 44 s to 54 s

• 54 s to 60 s

Tags

NGSS.MS-PS3-1

This graph shows the motion of a skateboarder. During which time interval is the skateboarder experiencing negative acceleration (slowing down)?

• 0 s to 14 s

• 14 s to 44 s

• 44 s to 54 s

• 54 s to 60 s

Tags

NGSS.MS-PS3-1

This graph shows the motion of a skateboarder. During which time interval is the skateboarder experiencing no acceleration?

• 0 s to 14 s

• 14 s to 44 s

• 44 s to 54 s

• 54 s to 60 s

Tags

NGSS.MS-PS3-1

What are the three ways an object can accelerate?

• Speeding up, slowing down, or changing direction.

• Starting, stopping, or moving in a straight line.

• Pushing, pulling, or turning.

• Increasing mass, decreasing force, or changing friction.

A ball is tossed straight up into the air. As it travels upward, which statement is true?

• Its velocity is positive (upward) and its acceleration is positive (upward).

• Its velocity is positive (upward), but its acceleration is negative (downward) due to gravity.

Tags

NGSS.HS-PS2-1

Which of the following units is used to measure acceleration?

• Meters (m)

• Seconds (s)

• Meters per second (m/s)

• Meters per second squared (m/s²)

A satellite orbits Earth at a constant speed. A student claims it is not accelerating. Why is the student incorrect?

• The satellite is moving very fast.

• The satellite is constantly changing direction as it follows a curved path.

• The satellite is far from Earth's surface.

• The satellite is being pulled by the moon's gravity.

Tags

NGSS.MS-PS2-2