Quiz about 8.6A Balanced/Unbalanced Forces & Net Force

Question 1

Question 1.

Accepted Answer

Balanced

Answer

Unbalanced

Question 2

Question 2.

Accepted Answer

Unbalanced

Answer

Balanced

Question 3

Question 3.

Accepted Answer

Balanced

Answer

Unbalanced

Question 4

Question 4.

Accepted Answer

Balanced

Answer

Unbalanced

Question 5

How will this object move?

Accepted Answer

It will move to the right.

Answer

It won't move.

Answer

It will move to the left.

Answer

It will move up.

Question 6

A wheeled cart is moving to the right at a constant speed.  Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

Accepted Answer

Balanced Forces, Constant Speed

Answer

Balanced Forces, Acceleration

Answer

Unbalanced Forces, Constant Speed

Answer

Unbalanced Forces, Acceleration

Question 7

What is the net force?

Accepted Answer

5 N left

Answer

30 N left

Answer

25 N right

Answer

55 N right

Question 8

What is the net force?

Accepted Answer

40 N right

Answer

40 N left

Answer

0 N Balalnced

Answer

400 N right

Question 9

Which could be an example of a balanced force?

Accepted Answer

An asteroid moving at a constant speed through space

Answer

A car accelerating from a stop sign

Answer

A box of dishes falling from a counter

Answer

A rocket taking off

Question 10

What is the net force?

Accepted Answer

0 N

Answer

10 N

Answer

25 N

Answer

1 N

Question 11

These forces are...

Accepted Answer

Unbalanced

Answer

Balanced

Question 12

These forces are...

Accepted Answer

Unbalanced

Answer

Balanced

Question 13

These forces are...

Accepted Answer

Balanced

Answer

Unbalanced

Question 14

The net force is...

Accepted Answer

0 N

Answer

50 N

Answer

100 N

Answer

2500 N

Question 15

Balanced or unbalanced?

Accepted Answer

unbalanced

Answer

balanced

Question 16

The sum of all forces acting on an object.

Accepted Answer

Net Force

Answer

Contact Force

Answer

Balanced Force

Answer

Unbalanced Force

Question 17

If an object is not moving the forces acting upon it are _____________

Accepted Answer

balanced

Answer

unbalanced

Answer

weak

Answer

Hulk Smash!

Question 18

What is a PUSH or PULL of an object?

Accepted Answer

Force

Answer

Motion

Answer

Friction

Answer

Gravity

Question 19

Which of the following objects will experience an unbalanced force?

Accepted Answer

A ball rolling across the floor with friction acting in the opposite direction.

Answer

A bike rider on a smooth and level road, pedaling at a constant rate.

Answer

A train pulling on another train, each with the same amount of force.

Answer

A chair sitting on the floor with balanced forces acting in opposite directions.

Question 20

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?

Accepted Answer

60 N right

Answer

10 N left

Answer

60 n right

Answer

50 N left

Question 21

A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

Accepted Answer

Balanced Forces, Constant Speed

Answer

Balanced Forces, Acceleration

Answer

Unbalanced Forces, Constant Speed

Answer

Unbalanced Forces, Acceleration

Question 22

If two forces act on an object in the same direction, the net force is the _____________

Accepted Answer

the sum of the two forces

Answer

the difference between the two forces

Answer

Only one of the forces acts on the object

Answer

DOOMSDAY!

Question 23

What is the net force?

Accepted Answer

400 N Down at an increasing speed

Answer

400 N Up at an increasing speed

Answer

400 N Down at a constant speed

Answer

800 N Down at a constant speed

Question 24

Why does a book on a table not move?

Accepted Answer

Forces of the table pushing up and gravity pulling down are balanced

Answer

No forces are acting on the book

Answer

Gravity is the only force acting on the book

Question 25

What will cause an object to move?

Accepted Answer

Unbalanced forces

Answer

Applied forces

Answer

Balanced forces

Question 26

(T or F?) A balanced force is only an object that is not moving.

Accepted Answer

False

Answer

True

Question 27

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

Accepted Answer

Balanced

Answer

Unbalanced

Question 28

Why is person B having a hard time moving down the hill?

Accepted Answer

Person B has more friction than person A.

Answer

Person B has the same friction as person A.

Answer

Person B is out of shape.

Answer

Person B has less friction has person A.

Question 29

If the car in the diagram rolls faster and faster as it moves down the ramp, you can be sure that

Accepted Answer

the forces acting on it are unbalanced.

Answer

there is no friction acting on the object.

Answer

the net force on the car is 0 N.

Answer

only gravity is acting on the car.

Question 30

Based on the information in the diagram, what is the net force acting on this object?

Accepted Answer

4 N downward at an increasing speed

Answer

12 N downward at a constant speed

Answer

4 N upward at an increasing speed

Answer

8 N to the left at a constant speed

Question 31

Students are playing tug-of-war. If group B pulls the rope to the right with a force of 400 N and group A pulls the rope to the left with a force of 250 N, what will happen to the ribbon in the middle of the rope?

Accepted Answer

The ribbon will move to the right and group B will win the tug-of-war.

Answer

The ribbon will move to the left and group A will win the tug-of-war.

Answer

The ribbon will move to the left and group B will win the tug-of-war.

Answer

The ribbon will move to the right and group A will win the tug-of-war.

Question 32

A cyclist traveling at 25 km/hr turns sharply to the left while continuing to move 25 km/hr. This means the forces involved are_____________________.

Accepted Answer

Unbalanced, because his direction changed.

Answer

Balanced, because the cyclist's speed did not change.

Answer

Balanced, because he was still moving forward.

Answer

Unbalanced, because it's the same bicycle.

Question 33

The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to move to the right?

Accepted Answer

Object Y

Answer

Object W

Answer

Object X

Answer

Object Z

Question 34

The forces represented by the arrows in the diagrams are applied to the four objects that are at rest on a table. Which object is most likely to remain in place?

Accepted Answer

Object Z

Answer

Object W

Answer

Object X

Answer

Object Y

Question 35

If a force does not cause an object to move, it's considered a(n) __________________ force.

Accepted Answer

Balanced

Answer

Unbalanced

Answer

Wimpy

Answer

Weak

Question 36

An airplane is travelling North through the sky at a constant speed when turbulence causes it to take a different route, changing its direction. Explain the forces at work on this plane.

Accepted Answer

Unbalanced, because the speed is constant and there is a change in direction

Answer

Unbalanced, because the plane is moving forward, not backwards

Answer

Balanced, because the plane is not falling to a lower altitude

Answer

Unbalanced, because the plane is in motion

Question 37

An airplane is travelling at a constant speed of 540 mph.  Explain the forces at work on the plane.

Accepted Answer

Balanced, because the speed is constant and there is no change in direction

Answer

Unbalanced, because the plane is moving forward not backards

Answer

Balanced, because the plane is not falling to a lower altitude

Answer

Unbalanced, because the plane is in motion

Question 38

Imagine a bat swinging with a force of 1200 N, hitting a ball pitched with a force of 400 N. At what net force does the ball move away from the bat?

Accepted Answer

800 N

Answer

1600 N

Answer

400 N

Answer

Net force of 0 N

Question 39

The roller coaster car begins at point W.  At what point along the track will the car have the greatest amount of kinetic energy?

Accepted Answer

X

Answer

W

Answer

Y

Answer

Z

Question 40

What is the unit to MEASURE force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Pascal

Question 41

What will cause an object to move?

Accepted Answer

Unbalanced forces

Answer

Applied forces

Answer

Balanced forces

Question 42

Calculate the Net Force.

Accepted Answer

60N, Right

Answer

60N, Left

Answer

100N, Right

Answer

100N, Left

Question 43

On which surface would friction be the greatest?

Accepted Answer

carpet

Answer

ice

Answer

snow

Answer

water

Question 44

A book rests on a table. The force of gravity pulls down on the book with a force of 20 newtons. What prevents the books from moving downward?

Accepted Answer

The table presses back up on the book with an equal and opposite force of 20 newtons.

Answer

The table presses back up on the book with a force greater than 20 newtons.

Answer

The table and the book together are accelerating downwards at 9.8 m/sec²

Answer

The inertia of the book holds it up

Question 45

Which one is balanced?

Accepted Answer

top

Answer

bottom

Answer

both

Question 46

Is it BALANCED?

Accepted Answer

No

Answer

Yes

Question 47

If there are two forces going in the SAME direction, you would ...?

Accepted Answer

(+) Add the forces

Answer

(-) Subtract the forces

Answer

Neither

Answer

(x) Multiply

Question 48

The FORCE that PULLS things down or back to EARTH.

Accepted Answer

Gravity

Answer

Speed

Question 49

If the net force is 0 the object will ...

Accepted Answer

STAY the SAME, NOT Move

Answer

CHANGES motion

Question 50

What is the net force?

Accepted Answer

35 N right

Answer

65 N left

Answer

65 N right

Answer

35 N left

Question 51

What is the net force?

Accepted Answer

2.2 N left

Answer

4.2 N left

Answer

4.2 N right

Answer

2.2 N right

Question 52

What is the net force?

Accepted Answer

2.5 N right

Answer

5.5 N left

Answer

5.5 N right

Answer

2.5 N left

Question 53

What is the net force?

Accepted Answer

11 N left

Answer

11 N right

Answer

3 N left

Answer

3 N right

Question 54

What is the net force?

Accepted Answer

3 N left

Answer

3 N right

Answer

7 N left

Answer

7 N right

Question 55

The graph shows how the speed of an object changed over time. During which segments of this graph were the forces acting on the object balanced?

Accepted Answer

Q and S

Answer

R only

Answer

R and T

Answer

R, S and T

Question 56

The diagram below shows a skateboarder pushing himself forward with a force of 25 N while the wind pushes back with a force of 5 N. How will the skateboarder be affected if the force of the wind increases to 8 N?

Accepted Answer

The speed of the skateboarder will decrease.

Answer

The speed of the skateboarder will increase.

Answer

The speed of the skateboarder will remain constant.

Answer

The skateboarder will come to a stop.

Question 57

This list below includes six different scenarios. Which objects in the list experience an unbalanced force?

Accepted Answer

The ball, the cat, and the flag

Answer

The marble, the book and the toy car

Answer

The cat, the book, and the flag

Answer

The marble, the ball, the cat, and the toy car

Question 58

How do you find the net force of this image.

Accepted Answer

Add the green arrows and subtract the orange arrow.

Answer

Add up all the arrows

Answer

Add a green arrow and the orange arrow.

Answer

Subtract all the arrows.

Question 59

If a car has a force of 54 N forwards and the brakes have a force of 73 N backwards, what is the overall Net Force.

Accepted Answer

19 forwards

Answer

16 backwards

Answer

18 backwords

Answer

23 forwards

Question 60

If the wind is heading south with a force of 5 N, and a car is going north with force of 78936 N, what is the Net Force and Direction.

Accepted Answer

78931 N North

Answer

78931 N South

Answer

78531 N North

Answer

78531 N South

Question 61

What is the Net Force and which direction will the object move?

Accepted Answer

70, Right

Answer

641, Left

Answer

571, Left

Answer

480, Right

Question 62

Is the Net Force balanced or Unbalanced?

Accepted Answer

Unbalanced

Answer

Balanced

Question 63

If a boat traveling East has a Net Force of 324 N, and the wind blowing West has a Net Force of 789 N. What is the overall Net Force and which side?

Accepted Answer

465 N, West

Answer

465 N, East

Answer

1113 N, West

Answer

1113 N, East

Question 64

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

Accepted Answer

4 N Left No

Answer

12 N Right No

Answer

12 N Right Yes

Answer

4 N Left Yes

8.6A Balanced/Unbalanced Forces & Net Force

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