What is the object's motion if the object has a positive velocity and negative acceleration?

• The object is speeding up.

• The object is slowing down.

• The object is at rest.

• The object is moving at constant velocity.

Tags

NGSS.HS-PS2-1

A mousetrap powered car begins from rest; travels away from its starting point, and then stops after 2 seconds. If the mousetrap powered car crosses the finish line with a speed of 2.4 m/s, what was the car's average velocity?

• 1.2 m/s

• .12 m/s

• 12 m/s

• 2.1 m/s

The graph represents an object that is standing still.

• True

• False

Which section of the graph shows constant velocity?

• A

• B

• C

• F

Suppose a motorcycle is moving in a straight line and steadily increases its speed from 15 m/s to 28 m/s in 3 seconds. Calculate the motorcycle's acceleration.

• 4.33 m/s

• 14.33 m/s

• 4.33 m/s²

• 14.33 m/s²

Tags

NGSS.HS-PS2-1

An athlete runs twice around a circular track with a total length of 600 m. What is the runner's total displacement for the race?

• 600 m

• 1200 m

• 300 m

• 0 m

What is acceleration?

• A change in position over time.

• A change in velocity over change in position.

• A change in displacement over change in time.

• A change in velocity over change in time.

Tags

NGSS.HS-PS2-1

Two trucks of different masses collide head-on and STOP at the point of collision. Before the collision, --

• the acceleration of the blue truck equals the acceleration of the yellow truck.

• the mass of the blue truck equals the mass of the yellow truck.

• the momentum of the blue truck is equal but opposite to the yellow truck.

• the velocity of the blue truck is equal but opposite to the yellow truck.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

NGSS.HS-PS2-3

Two forces are applied to a 2.0 kg block on a frictionless surface, as shown in the diagram. The acceleration of the block is --

• 3.0 m/s² to the right.

• 3.0 m/s² to the left.

• 5.0 m/s² to the right.

• 5.0 m/s² to the left.

Tags

NGSS.HS-PS2-1

When comparing the momentum of two moving objects, which statement is ALWAYS correct?

• The object with greater velocity has less momentum.

• The object with smaller mass has greater momentum.

• The object with greater mass and smaller velocity has greater momentum.

• The object with greater mass and greater velocity has greater momentum.

Tags

NGSS.HS-PS2-2