Unit 2 Force and Motion Review

Which of the following always causes change in speed, direction, or both?

• balanced forces

• unbalanced forces

• either balanced or unbalanced forces

• any combination of forces

Tags

NGSS.MS-PS2-2

When a teacher is standing at the front of the class, the force of gravity is pulling them down toward the ground. The ground is pushing back with an equal and opposite force. This is an example of

• Newton's First Law of Motion

• Newton's Second Law of Motion

• Newton's Third Law of Motion

• Newton's Law of Universal Gravitation

When is it clear that balanced forces are acting on an object?

• The object's motion changes direction.

• The object's motion does not change.

• The object begins moving.

• The object stops moving.

A car is traveling 40 kilometers an hour. It turns right at 40 kilometers per hour. The action the car takes changes its

• acceleration.

• speed.

• direction, but not its acceleration

• speed, but not its direction.

An object with increasing acceleration is also increasing in which other property

• mass

• temperature

• velocity

• volume

Ezra's mother told her she was "moving at a snail's pace." How could Ezra determine the average speed of a snail?

• She can subtract the snail's density from the time it takes for it to cover a set distance.

• She could divide a set distance by the time it takes the snail to move that distance.

• She could add together the times it takes the snail to cover several set distances.

• She could multiply the snail's mass by the time it takes it to cover a set distance.

Which of the following quantities is a velocity?

• 25 m/s

• 3 g/L in weight

• 15 m/s

• 10 km/hr eastward

Which answer choice best explains why tractor trailers take more time to speed up and slow down than regular cars?

• Tractor trailers have less mass and require less force to move

• Tractor trailers have more mass and require more force to move

• Tractor trailers have less mass and require more force to move

• Tractor trailers have more mass and require less force to move

Tags

NGSS.MS-PS2-2

Sam was learning how to roller skate. He did not want to go fast. On which kind of floor surface would Sam move the slowest?

• carpet

• tile

• concrete

• wood

Why do the values on the graph form a straight line?

• The speed is constant

• The distance remains unchanged

• The direction of motion stays the same.

• The speed gradually increases over time.