Which objects have a STRONG force of gravity?

Objects with GREATER mass, like elephants

Objects with LESS mass, like mice

Why can astronauts jump and float a little on the Moon?

Because the Moon's gravity is NOT that STRONG.

Because the Moon's gravity is VERY STRONG.

Do astronauts float away on the moon?

No, because Moon's gravity pulls them down.

Yes, they float and can't even walk!

Where would you have more mass , on Earth or on the Moon?

IS THE SAME, mass DOESN'T CHANGE

How do magnets exert force over a distance?

they have a very strong electric force

they have tiny, invisible hooks around their edges

they create chemical imbalances

A balloon has a negative charge. The glass rod has a positive charge. What will happen when the glass rod is brought near the balloon?

The balloon will be attracted to the rod

The balloon will be repelled by the rod

The balloon will remain in place

The balloon will spin in circles

Which statement is true about balanced and unbalanced forces?

Balanced forces can either have no motion or have an object moving at a constant speed

Neither balanced or unbalanced forces cause motion

Unbalanced forces do not change motion and balanced forces change motion

Whenever a car is moving at a constant speed, which choice is true

All forces acting on the car are balanced

The car has positive acceleration

The car has negative acceleration

All forces acting on the car are UNbalanced, because the car is in motion

There is one person pushing a box to the RIGHT with 20 Newtons of force and one person pushing to the LEFT with 15 Newtons of force. What is true about the forces acting on the box?

The forces are NOT balanced and the box will move to the right

The forces are NOT balanced and the box will move to the left

The forces ARE balanced and the box will not move

The forces ARE balanced and the box will move to the left

Marni runs 1500 meters around the school track. What does she need to know in order to find out her speed?

her heart rate at the finish line

the direction she began running

Invisible Forces Review

Authored by Charles Martinez

Science

8th Grade

NGSS covered

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88 questions

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MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the net force?

40 N left

0 N Balalnced

400 N right

40 N right

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How will this object move?

It won't move.

It will move to the right.

It will move to the left.

It will move in both directions.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

How will this object move?

It won't move.

It will move to the right.

It will move to the left.

It will move up.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the net force?

30 N left

25 N right

5 N left

55 N right

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which could be an example of an unbalanced force?

A plate sitting on a dining table

A ball at the top of a hill that is not moving

Earth orbiting the Sun

A baseball that has been thrown to home plate.

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

60 N right

10 N left

60 n right

50 N left

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the net force?

400 N Up

400 N Down

- 400 N Down

800 N Down

Tags

NGSS.MS-PS2-2

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Invisible Forces Review

What is the net force?

How will this object move?

How will this object move?

What is the net force?

Which could be an example of an unbalanced force?

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

What is the net force?

Forces that have a net force of zero ( the object is still).

The sum of all forces acting on an object and direction

8 N to the left , and 4 N to the right. Find the net force. Is this balanced ?

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