Forces and Motion Test Review

A bakery delivery van is transporting a wedding cake across town to the location of a wedding reception. Which of Newton’s laws BEST explains why the driver of the van would want to be extra careful when making stops and turns along the route?

• Law of Action-Reaction

• Law of Force and Acceleration

• Law of Inertia

• Law of Conservation of Matter

A large rock is motionless on a flat sidewalk. Which statement best explains why the rock remains motionless?

• There are no forces acting on the rock.

• The only force acting on the rock is directed toward the sidewalk.

• The forces acting on the rock are balanced.

• The sidewalk exerts an unbalanced force on the rock.

A toy train engine rests motionless on a track. One student begins pushing the engine to the right with a force of 2 newtons. At the same time, another student begins pushing the engine to the left with a force of 5 newtons. Which of the following best describes the resulting motion of the engine?

• It travels left at a constant speed.

• It travels left at an increasing speed.

• It travels right at a constant speed.

• It travels right at an increasing speed.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A roller coaster containing three cars is accelerating at 10 m/s before it comes to an abrupt stop at the end of the ride. The mass of each car is 300 kg. How much force was exerted on the roller coaster to bring it to a stop?

• 30 N

• 900 N

• 3000 N

• 9000 N

Tags

NGSS.MS-PS2-2

Which answer choice best describes the movement of the object between the times of 0 and 6 seconds on the graph?

• Moving at a constant speed

• Accelerating

• Moving toward the north

• Stopped

Tags

NGSS.MS-PS3-1

A block is pulled 0.90 m to the right in 2.5 s. What is the block's average speed to the nearest hundredth of a m/s?

• 2.25 m/s

• 2.77 m/s

• .36 m/s

• .036 m/s

Tags

NGSS.MS-PS3-1

A group of four students is participating in a marble race. Each marble has a different mass and the same force is applied to each marble. The data of each marble is shown in the table above. Which law best describes this experiment?

• Law of Inertia

• Law of Force and Acceleration

• Law of Action-Reaction

• Law of Conservation of Matter

Tags

NGSS.MS-PS2-2

A bus travels 20 km in 30 minutes. What is the average speed of the bus in km/hr?

• 20 km/hr

• 30 km/hr

• 40 km/hr

• 50 km/hr

If the load exerts a strong downward force, the glue-

• destroys the force

• exerts a stronger downward force

• causes the load to accelerate upward

• exerts an upward force that is equal to the downward force

Tags

NGSS.MS-PS2-2

If a car is moving on a road at 70 km/hr going due north, and then changes direction and starts traveling north-east staying at 70 km/hr, which statement best describes what happens to its speed and velocity?

• The speed of the car changes, but the velocity stays the same.

• Both the speed and velocity of the car change.

• Neither the speed nor the velocity of the car changes.

• The velocity of the car changes, but the speed stays the same.