Forces Test Review

The law of inertia states that an object in motion will stay in motion, and an object at rest will stay at rest, unless acted upon by an unbalanced force. Which of Newton's Laws is this?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• The Law of Conservation of Mass

A box experiences forces of 2 N to the left and 3 N to the right. Which is true of the box's motion?

• The box will slow down.

• The box's speed will be exactly 1 mile per hour.

• The box's velocity will not change.

• The box will experience acceleration.

Tags

NGSS.MS-PS2-2

Two forces are acting on a wheelbarrow. Equal and opposite forces are pushing to the left and to the right. What can you say about the wheelbarrow's movement?

• It is slowing down.

• It is not accelerating.

• It is moving faster and faster.

• Its speed is changing at a constant rate.

Tags

NGSS.MS-PS2-2

In which situation is the object experiencing unbalanced forces?

• A box resting on a horizontal floor.

• A car slowing as it reaches a traffic light.

• A car with its cruise control set to 30 km/h.

• A penny at terminal velocity after falling off of a building.

Tags

NGSS.MS-PS2-2

Which object has balanced forces acting upon it?

• A boat moving through the water.

• A book sitting on a high shelf.

• A wagon rolling down a steep hill.

• A baseball thrown in the air.

A train rolls to a stop along a flat horizontal track - without the conductor applying the brakes. What BEST explains why this occurred?

• The train ran out of momentum.

• The opposing force of friction stopped the train.

• The natural state of the train is not to be in motion.

• The force of gravity slowed the train until it stopped.

Tags

NGSS.MS-PS2-2

Changes in motion are caused by

• all forces

• strong forces

• balanced forces

• unbalanced forces

Tags

NGSS.MS-PS2-2

Two opposite forces are acting on a rope. What happens if the force on each side of the rope is doubled to 150 Newtons?

• It cannot be determined without knowing which man is stronger.

• The forces are not balanced, because one man is standing taller than the other.

• The forces are balanced. But, the forces acting on the rope have increased and the rope’s motion is affected.

• The forces are balanced. Thus, there is no change in forces acting on the rope, and the rope’s motion is not affected.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What happens when Jose applies 6 Newtons of force to one side of a box and Gina applies 6 Newtons of force to the other side of the box?

• The box does not move.

• The box moves toward Gina.

• The box moves toward Jose.

• The box moves upwards.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Jose applies 10 Newtons of force to one side of a box, and Gina applies 8 Newtons of force to the other side. What happens?

• The box does not move.

• The box moves toward Gina.

• The box moves toward Jose.

• The force crumples the box.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2