Jodie sets two objects on a flat surface. Object A has a mass of 50g, while object B has a mass of 250g. Jodie pushes both objects with the same force and watches them speed up. Which object will speed up more?

They speed up at the same amount

Astronauts on the Moon can jump higher than if they were on Earth. This is because...

the Moon is less massive than the Earth.

Newton's laws of motion do not apply to the Moon.

there is no friction on the Moon.

the astronauts are less massive on the Moon.

Which of the following best illustrates a use of friction in the transportation industry?

When a locomotive's brakes are applied to train tracks, the force between the brakes and the tracks causes the locomotive to slow down.

When a ship is launched out to sea, the downward force of the ship onto the water is balanced by the water's upward force onto the ship.

When a passenger jet burns fuel and shoots exhaust out its back end, the jet responds by moving forward.

When a driver applies a force to a car's accelerator pedal, the car responds by traveling at a faster speed.

Jennifer stands on one side of a filing cabinet and pushes with a force of 60 N. If Nathan wants to help Jennifer demonstrate balanced forces, what does he need to do?

stand on the opposite side of the cabinet and push with a force of 60 N toward Jennifer

stand on the opposite side of the cabinet and push with a force of 120 N toward Jennifer

stand on the same side of the cabinet and push with a force of 60 N in the same direction as Jennifer

Nora tied a string around a tennis ball, and then she swung it in a circle in front of her to demonstrate a planet orbiting the Sun. She explained that her hand represented the Sun, the ball represented a planet, and the string kept the ball from leaving the "orbit" around her hand. Why doesn't the string work in the same way as gravity?

The string holding the ball in orbit is a contact force; gravity is a noncontact force

The string only pulls one way; gravity pulls both ways.

The string keeps the distance between the bodies the same; gravity makes the distance vary.

There is no difference between the two systems.

The Earth has a magnetic field around it, which is generated by its molten core. This magnetic field exerts a force on compass dials, which are magnets, causing them to align with the Earth's magnetic field. This force on compass dials is an example of a force that _______.

acts through particles in the air.

Leah watches a toy car move across a table at a constant speed. The car moves across the table in one direction and falls off the other side. Leah decides to try another situation. She watches the car move across the table at a constant speed, then when it reaches the other side of the table, her friend Joey pushes the car in the other direction. The car moves back to Leah. Based on Leah's informal experiment, the car changes direction because of _______ force, which happens because _______.

an unbalanced; Joey pushes the car

a balanced; the car moves across the table

an unbalanced; Leah watches the car

a balanced; Joey pushes the car

A book is sitting on the table at rest. The forces acting on the book include _______, and these forces are _______.

gravity pushing down and the table pushing up; balanced

gravity pushing up and friction pushing to the right; balanced

gravity pushing down and the table pushing up; unbalanced

gravity pushing up and friction pushing to the right; unbalanced

Which explanation describes the forces involved for a person to walk down the sidewalk?

The person's feet push backward on the sidewalk; the sidewalk pushes forward on the person.

The person's feet push forward on the sidewalk; the sidewalk does not push on the person.

The person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

The person's feet push backward on the sidewalk; the sidewalk pushes backward on the person.

Kent is twirling a ball attached to a string in a clockwise direction. If Kent lets go of the string, which of the following describes the motion that the ball will take if there are no gravitational forces influencing the motion of the ball?

It will continue in a straight line.

It will curve up and then fall to the ground.

It will fall straight to the ground.

It will curve down and then turn back up.

The image shows a force of 10 N being applied to an object. The force is being applied toward the right, so the object is accelerating to the right. No other force is acting on the object. A second force of 7 N is applied to the object. If this second force is applied toward the left while the first force is still being applied toward the right, which of the following will occur? Examine the image. Then, answer the question that follows.

The object will continue moving toward the right, but its rate of acceleration will decrease.

The object will begin moving toward the left, and it will move at a faster speed.

The object will begin moving toward the left, and it will move at a slower speed.

The object will continue moving toward the right, and its rate of acceleration will increase.

Which statement is true about the gravitational force?

It acts on all objects all of the time.

It only acts on objects that are close to each other.

It only acts on objects that are in contact.

It only acts on objects that are moving apart.

What is the definition of inertia?

The tendency of a body at rest to stay at rest or of a body in motion to remain in motion.

The amount of force required to reach the speed of light.

The rate at which an object accelerates.

The tendency of an object in motion to decelerate.

A hockey puck slides across an ice rink more easily than it does across a rough concrete surface. Why is this?

There is less friction on the ice rink.

There is more gravity on the ice rink.

There is more friction on the ice rink.

There is less gravity on the ice rink.

Which of the following situations demonstrates balanced forces?

a car driving on a straight freeway at 60 miles per hour

a rock thrown upward, being acted on by gravity

Chapter 2 Review #2 Images

Authored by Samantha Neas

Physics

7th - 9th Grade

NGSS covered

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33 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which object most likely exerts the strongest gravitational pull on other objects?

beach ball

baseball

golf ball

bowling ball

Tags

NGSS.MS-PS2-4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Katie rubs a balloon against her hair. Electrons from her hair travel to the balloon, giving the balloon a negative charge and her hair a positive charge.When the negatively charged balloon is brought near the strands of Katie's hair, they move to get closer to the balloon, without the balloon actually touching them. This shows that

particles in the air must be pulling Katie's hair toward the balloon.

Katie's hair would move in this way with or without the balloon

electric attraction is a force that can only act on contact

electric attraction is a force that can act at a distance.

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled Q?

the force of magnetism

the force of gravity

the net force of the object

the force of air resistance

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Gina is driving her car down the street. She has a teddy bear sitting on the back seat. A dog runs in front of Gina's car, so she quickly applies the brakes. The force of the brakes causes the car to stop, but the teddy bear continues to move forward until it hits the car's dashboard.

The teddy bear did not stop at the same time as the car because

objects in motion tend to stay in motion unless acted upon by an outside

only objects touching the Earth's surface can be acted upon by an outside

more force is required to stop softer objects than to stop harder objects.

objects in motion can only be stopped by the application of a balanced force.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In an experiment, six people at different places around the Earth drop an apple at the same time. Which apples will fall to the Earth?

Only apples U and Z will fall to the Earth

Only apple U will fall to the Earth.

All of the apples will fall to the Earth.

Only apples U, V, Y and Z will fall to the Earth.

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is a force?

A force is a substance that reacts with matter.

A force is a form of energy.

A force is a push or a pull.

A force is equivalent to work.

Tags

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The gravitational force between which two objects would be the most difficult to notice?

the Moon and a water particle

the Moon and the Earth

the Earth and the Sun

a water particle and an air particle

Tags

NGSS.MS-PS2-5

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Chapter 2 Review #2 Images

Which object most likely exerts the strongest gravitational pull on other objects?

The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled Q?

In an experiment, six people at different places around the Earth drop an apple at the same time. Which apples will fall to the Earth?

What is a force?

The gravitational force between which two objects would be the most difficult to notice?

Charles rolled a ball across the floor and noticed that it stopped before reaching the other side of the room. A force applied to the ball in the opposite direction in which it was rolling caused this to happen.

What is the name of this force?

The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled P?

Jodie sets two objects on a flat surface. Object A has a mass of 50g, while object B has a mass of 250g. Jodie pushes both objects with the same force and watches them speed up. Which object will speed up more?

Access all questions and much more by creating a free account

Popular Resources on Wayground

Discover more resources for Physics

Chapter 2 Review #2 Images

Which object most likely exerts the strongest gravitational pull on other objects?

The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled Q?

In an experiment, six people at different places around the Earth drop an apple at the same time. Which apples will fall to the Earth?

What is a force?

The gravitational force between which two objects would be the most difficult to notice?

Charles rolled a ball across the floor and noticed that it stopped before reaching the other side of the room. A force applied to the ball in the opposite direction in which it was rolling caused this to happen. What is the name of this force?

The box in the above picture is falling from the top of a building to the ground. Two major forces are acting on the box as it falls. Which force is represented by the arrow labeled P?

Jodie sets two objects on a flat surface. Object A has a mass of 50g, while object B has a mass of 250g. Jodie pushes both objects with the same force and watches them speed up. Which object will speed up more?

Access all questions and much more by creating a free account

Popular Resources on Wayground

Discover more resources for Physics

Charles rolled a ball across the floor and noticed that it stopped before reaching the other side of the room. A force applied to the ball in the opposite direction in which it was rolling caused this to happen.

What is the name of this force?