Test Review: Forces & Newtons Laws

One of the laws of motion states, "An object in motion stays in motion unless an unbalanced force acts upon it." On Earth, objects always seem to eventually come to a stop when more force is not being applied.

What force is causing the objects to eventually stop moving?

• Mass

• Friction

• Weight

• Gravity

A 2000 kg truck and a 500 kg car are racing. The same amount of force is applied to each of them.

Which statement below best describes the acceleration of the vehicles?

• The truck will accelerate twice as fast.

• The car will accelerate four times as fast.

• The car will accelerate twice as fast.

• The truck will accelerate four times as fast.

Tags

NGSS.MS-PS2-2

When an object is acted on by unbalanced forces, the object will always —

• accelerate

• continue in the same direction

• continue at the same speed

• come to a stop

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NGSS.MS-PS2-2

It takes a 7 N force to cause a 0.028 kg object to begin moving. What is the acceleration of the object as it begins to move?

• $250\ \frac{m}{s^2}$

• $0.196\ \frac{m}{s^2}$

• $0.004\ \frac{m}{s^2}$

• $2.50\ \frac{m}{s^2}$

Tags

NGSS.MS-PS2-2

A student pushes a box with a force of 16 N to the left. Another student pushes the same box from the opposite side with a force of 8 N to the right.

According to the above information and diagram, what will be the result?

• The box will move to the right with an 8 N force.

• The box will move to the right with a 24 N force.

• The box will move to the left with a 2 N force.

• The box will move to the left with an 8 N force.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A rocket booster initially applies 10,000 N of force to a 1,000.0 kg rocket causing it to accelerate at 10.0 m/s². Ten minutes later, the rocket booster is released and it falls through the atmosphere.

The mass of the rocket is now 760.0 kg and its acceleration is 7.0 m/s². How much force is now being applied to the rocket?

• 5320 N

• 10.857 N

• 1.085 N

• 0.0092 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Two vehicles were involved in an accident. Vehicle A has a mass of 1,447 kg, and Vehicle B has a mass of 1,310 kg. Both vehicles were traveling at 20 km/hr at the time of collision.

What will most likely be the outcome of this collision?

• Vehicle A will have no change in speed and be pushed to the left because it has a smaller mass.

• Vehicle A will have a change in speed and be pushed to the left because it has a larger mass.

• Vehicle B will have no change in speed and be pushed to the left because Vehicle A has a larger mass.

• Vehicle B will have a change in speed and be pushed to the right because Vehicle A has a larger mass.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

A marble is rolling east along the floor at a speed of 0.5 m/s.

If a student exerted a force of 1 N towards the north, what would be the effect on the speed and direction of the marble?

• The speed of the marble would be unchanged, and the direction would change to the northeast.

• The speed of the marble would increase, and the direction would change to the northeast.

• The speed of the marble would be unchanged, and the direction would change to the north.

• The speed of the marble would increase, and the direction would change to the north.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

In a series of controlled experiments, students measure the different forces acting on a skateboarder as he travels down a hill. Then, they calculate the skateboarder’s acceleration for each of these forces. The students’ data table is shown below:

Based on the observations and the calculations made by the students, what is the estimated force applied to the skateboarder if the acceleration is 0.90 m/s²?

• 36 N

• 37 N

• 40 N

• 50 N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The masses of four bowling balls, and the net forces acting on them as they approach the pins at the end of the lane, are recorded in the table below.

Which bowling ball has the greatest acceleration as it approaches the pins at the end of the lane?

• The green ball

• The red ball

• The pink ball

• The purple ball

Tags

NGSS.MS-PS2-2