A student conducted an experiment with an electromagnet and paperclips. Her data is shown in the graph at the left. Which question could best be answered by this experiment?

How does the current flowing through an electromagnet affect the magnet's strength?

what kinds of objects are attracted by the electromagnet?

How many paperclips can an electromagnet hold before current stops flowing through it?

Does putting more paperclips onto an electromagnet increase the current flowing through the magnet?

A student built a simple electromagnet with a size D battery, some copper wire, and an iron nail. She performed a simple experiment with her electromagnet. Her data is shown below. Which question could best be answered by her experiment?

How does the number of loops affect the magnet's strength?

Does battery size affect the number of paperclips the magnet can hold?

Will an electromagnet work with wire made from iron instead of copper?

What is the maximum number of paperclips that the magnet can hold?

A 2-kg plant resting on a table applies a force of approximately 20 N downward on the table and the table applies 20 N upward to the plant. WHY?

When two objects interact, they apply equal and opposite forces against each other.

The table must apply twice the force on the plant to keep the plant from falling.

The force applied by an object is the product of the object's mass and the acceleration of gravity.

The force applied by the table is the quotient of the plant's mass and its applied force on the table.

If a chair applies force of 300 N to a child then the child must apply 300 N to the chair. Which best explains this?

The chair and child apply equal and opposite forces against each other when they interact.

The chair must apply at least twice the force to keep from collapsing.

The force applied by an object is the product of the object's mass and the acceleration of gravity.

The force applied by the chair is the quotient of the child's mass and his downward force on the chair.

Which situation most clearly presents an example of Newton's third law of motion?

The wheels of a car push backward against the road while the road pushes the wheels forward.

The force that occurs when two cars collide is dependent upon their mass and velocity.

A car with zero velocity will not move until it is acted upon by some horizontal force.

A moving car with some velocity will not slow down unless friction is applied to the tires.

The image shows an art display. Behind the canvas is an iron bar wrapped in copper wire that is attached to a battery, and on the canvas are nails held in place. Why do the nails stay on the canvas instead of falling to the floor?

because the electricity from the battery turns the iron bar into a magnet

because the canvas and the nails have opposite magnetic poles

because the nails conduct the electric current produced by the battery

because the canvas blocks the repulsive force between the iron bar and nails

Reorder the following. Place the item with the least net force at the top of the list.

a 4kg object accelerating at 3 m/s 2

a 2 kg object accelerating at 8 m/s 2

a 10 kg object accelerating at 2 m/s 2

a 6 kg object accelerating at 4 m/s 2

Reorder the following with the item with LEAST FORCE at the TOP of the list.

a 2 kg object accelerating at 7 m/s 2

a 10 kg object accelerating at 4 m/s 2

a 6 kg object accelerating at 4 m/s 2

a 9 kg object accelerating at 3 m/s 2

physics 7

Authored by Lilibeth Bongalon

Physics

7th Grade

NGSS covered

Used 12+ times

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26 questions

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DROPDOWN QUESTION

30 sec • 1 pt

The force between the charges q₁ and q₂ is (a)

repulsive

attractive

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the potential energy of this system as charge #2 is moved away from charge #1?

it increases

it decreases

it remains the same

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which best supports that the potential energy will decrease as charge 2 is moved toward charge 1?

The magnitude of each charge is constant

opposite charges naturally attract each other

electric charges release energy when they are in motion

an external force is required to move the charges together

Tags

NGSS.MS-PS3-2

DROPDOWN QUESTION

30 sec • 1 pt

The force between charges q₁and q₂ is (a)

repulsive

attractive

Tags

NGSS.MS-PS2-3

DROPDOWN QUESTION

45 sec • 1 pt

The forces are repulsive when the magnitude doubles for both charges q1 and q2, the force between the two charges becomes (a)

four times greater

one quarter of what it was

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Assume that the force of gravitational attraction between two objects is 18 units.
What will the force of gravitational attraction between the objects be if the mass of both objects doubles and the distance between the objects doubles?

9 units

18 units

36 units

72 units

Tags

NGSS.HS-PS2-4

FILL IN THE BLANK QUESTION

30 sec • 1 pt

A 68-kg woman exerts 20 Newtons of force against a 12-kg box.How many Newtons of force does the box exert on the woman? (Use only the numeral keys to submit your answer. Do not include units.)

Tags

NGSS.MS-PS2-1

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physics 7

The force between the charges q₁ and q₂ is (a)

What happens to the potential energy of this system as charge #2 is moved away from charge #1?

Which best supports that the potential energy will decrease as charge 2 is moved toward charge 1?

The force between charges q₁and q₂ is (a)

The forces are repulsive when the magnitude doubles for both charges q1 and q2, the force between the two charges becomes (a)

Assume that the force of gravitational attraction between two objects is 18 units.
What will the force of gravitational attraction between the objects be if the mass of both objects doubles and the distance between the objects doubles?

A 68-kg woman exerts 20 Newtons of force against a 12-kg box.How many Newtons of force does the box exert on the woman? (Use only the numeral keys to submit your answer. Do not include units.)

A 40-kg boy exerts 10 Newtons of force against a 45-kg boy who is standing still. How many Newtons of force does the the second boy exert on the first boy? (Use only the numeral keys to submit your answer. Do not include units.)

A 1-kg book exerts 5 Newtons of force down on the 40-kg table on which it rests. How many Newtons of force does the table exert on the book? (Use only the numeral keys to submit your answer. Do not include units.)

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physics 7

The force between the charges q1 and q2 is ​ ​ (a)

What happens to the potential energy of this system as charge #2 is moved away from charge #1?

Which best supports that the potential energy will decrease as charge 2 is moved toward charge 1?

The force between charges q1 and q2 is ​ (a)

The forces are repulsive when the magnitude doubles for both charges q1 and q2, the force between the two charges becomes​ (a)

Assume that the force of gravitational attraction between two objects is 18 units.What will the force of gravitational attraction between the objects be if the mass of both objects doubles and the distance between the objects doubles?

A 68-kg woman exerts 20 Newtons of force against a 12-kg box.How many Newtons of force does the box exert on the woman? (Use only the numeral keys to submit your answer. Do not include units.)

A 40-kg boy exerts 10 Newtons of force against a 45-kg boy who is standing still. How many Newtons of force does the the second boy exert on the first boy? (Use only the numeral keys to submit your answer. Do not include units.)

A 1-kg book exerts 5 Newtons of force down on the 40-kg table on which it rests. How many Newtons of force does the table exert on the book? (Use only the numeral keys to submit your answer. Do not include units.)

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Physics

The force between the charges q₁ and q₂ is (a)

The force between charges q₁and q₂ is (a)

The forces are repulsive when the magnitude doubles for both charges q1 and q2, the force between the two charges becomes (a)

Assume that the force of gravitational attraction between two objects is 18 units.
What will the force of gravitational attraction between the objects be if the mass of both objects doubles and the distance between the objects doubles?