Unit 1 exam -- physics

Describe the relationship between the vectors for acceleration and velocity if an object is slowing down. 

• The vectors are showing constant speed.

• The vectors are at zero.

• The vectors are pointing in the same direction.

• The vectors are pointing in the opposite direction.

A child goes down a slide starting from rest. The length of the slide is 3 m and it takes the child 1.5 seconds to go down the slide. To calculate the final velocity, which equation should be used?

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In which segment is the bike rider moving the fastest?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

In which segment is the bike rider stopped?

• A

• B

• C

• D

What does velocity measure?

• The displacement per unit of time.

• The rate of change in speed.

• The distance an object moves.

• The time it takes for an object to move.

What does acceleration measure?

• The rate of displacement per unit of time.

• The change in speed per unit of time.

• How fast an object is moving.

• The distance an object moves.

Tags

NGSS.HS-PS2-1

Which of the following measurements is a vector?

• distance

• 88 degrees Celsius

• +88 m/s

• 35 seconds

In segment C, what is the snake doing?

• speeding up in the positive direction

• moving backwards

• slowing down in the positive direction

• maintaining constant acceleration in the forward direction

Tags

NGSS.HS-PS2-1

In which graph is the object accelerating?

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• All answers are correct.

Tags

NGSS.HS-PS2-1

Which statement describes the motion depicted in this graph?

• Constant velocity with zero acceleration.

• Displacement at a constant rate.

• Increasing velocity with constant acceleration.

• Not enough information in the graph.

Tags

NGSS.HS-PS2-1