What is happening in this simulation photo?

Refrigerator is at rest because the force of friction is equal to the applied force.

Refrigerator is at rest because the force of friction is bigger than the applied force.

Refrigerator is going a constant velocity because the force of friction is equal to the applied force.

Refrigerator is accelerating because the force of friction is smaller than the applied force.

4.3 net force extra practice

Authored by Erin Martin

Physics

12th Grade

NGSS covered

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14 questions

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HOTSPOT QUESTION

2 mins • 1 pt

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is 25 N? Click in the correct dot.

Tags

NGSS.HS-PS2-1

HOTSPOT QUESTION

2 mins • 1 pt

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is -10 N? Click in the correct dot.

Answer explanation

Gravity always pulls down on masses and that force is their weight. F_g
I label down forces as negative in these problems.

Tags

NGSS.MS-PS2-2

HOTSPOT QUESTION

2 mins • 1 pt

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

Answer explanation

To find net force, you add the up and down forces together.
Net force = 25 N + - 10 N = 25 N - 10 N = 15 N

Tags

NGSS.MS-PS2-2

HOTSPOT QUESTION

2 mins • 1 pt

The gray shaded dot represents a bucket you are lifting up. You apply a force of 15 N and the weight of the bucket is -8 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

Answer explanation

To find net force, you add the up and down forces together.
Net force = 15 N + - 8 N = 15 N - 8 N = 7 N

Tags

NGSS.MS-PS2-2

HOTSPOT QUESTION

2 mins • 1 pt

The gray shaded dot represents a bucket you are lifting up. You apply a force of 20 N and the weight of the bucket is -5 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

Answer explanation

To find net force, you add the up and down forces together.
Net force = 20 N + - 5 N = 20 N - 5 N = 15 N

Tags

NGSS.MS-PS2-2

DRAG AND DROP QUESTION

2 mins • 1 pt

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

2 kg

-19.6 N

40.4 N

60 N

0.8 N

14.4 N

none of these

20.8 N

Answer explanation

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

DRAG AND DROP QUESTION

2 mins • 1 pt

You lift a 3-kg bucket with a force of 50 N. The weight of the bucket is -29.4 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

3 kg

-29.4 N

50 N

60 N

0.8 N

14.4 N

none of these

-30.4 N

20.6 N

Answer explanation

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

Tags

NGSS.MS-PS2-2

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4.3 net force extra practice

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is 25 N? Click in the correct dot.

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is -10 N? Click in the correct dot.

Gravity always pulls down on masses and that force is their weight. F_g
I label down forces as negative in these problems.

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.
Net force = 25 N + - 10 N = 25 N - 10 N = 15 N

The gray shaded dot represents a bucket you are lifting up. You apply a force of 15 N and the weight of the bucket is -8 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.
Net force = 15 N + - 8 N = 15 N - 8 N = 7 N

The gray shaded dot represents a bucket you are lifting up. You apply a force of 20 N and the weight of the bucket is -5 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.
Net force = 20 N + - 5 N = 20 N - 5 N = 15 N

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 3-kg bucket with a force of 50 N. The weight of the bucket is -29.4 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 1-kg bucket with a force of 10.2 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

Mass is measured in kilograms
m = 1 kg
Weight is a force: F_g = mg
F_g = 1 kg · -9.8 m/s² = -9.8 N
This is the force down on the bucket
The force up is 10.2 N
The net force is the sum of the forces
10.2 N + - 9.8 N or 10.2 N - 9.8 N = 0.4 N

You lift a 4-kg bucket with a force of 50.2 N. What is the net force on the bucket?
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

Mass is measured in kilograms
m = 4 kg
Weight is a force: F_g = mg
F_g = 4 kg · -9.8 m/s² = -39.2 N
This is the force down on the bucket
The force up is 50.2 N
The net force is the sum of the forces
50.2 N + - 39.2 N or 50.2 N - 39.2 N = 11 N

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4.3 net force extra practice

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is 25 N? Click in the correct dot.

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which vector is -10 N? Click in the correct dot.

Gravity always pulls down on masses and that force is their weight. FgI label down forces as negative in these problems.

The gray shaded dot represents a bucket you are lifting up. You apply a force of 25 N and the weight of the bucket is -10 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.Net force = 25 N + - 10 N = 25 N - 10 N = 15 N

The gray shaded dot represents a bucket you are lifting up. You apply a force of 15 N and the weight of the bucket is -8 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.Net force = 15 N + - 8 N = 15 N - 8 N = 7 N

The gray shaded dot represents a bucket you are lifting up. You apply a force of 20 N and the weight of the bucket is -5 N. Which dot is by the correct net force on the bucket? Click in the correct dot.

To find net force, you add the up and down forces together.Net force = 20 N + - 5 N = 20 N - 5 N = 15 N

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.m (bucket) = ​ (a) Fg (bucket) = ​ (b) Force applied on bucket = ​ (c)

The force up is 40.4 and the force down is -19.6 N.Add these to get the net force.40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 NTo get net force, always add up to down and left to right.

You lift a 3-kg bucket with a force of 50 N. The weight of the bucket is -29.4 N.m (bucket) = ​ (a) Fg (bucket) = ​ (b) Force applied on bucket = ​ (c)

The force up is 40.4 and the force down is -19.6 N.Add these to get the net force.40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 NTo get net force, always add up to down and left to right.

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.m (bucket) = ​ (a) Fg (bucket) = ​ (b) Force applied on bucket = ​ (c) Net force on bucket = ​ (d)

The force up is 40.4 and the force down is -19.6 N.Add these to get the net force.40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 NTo get net force, always add up to down and left to right.

You lift a 1-kg bucket with a force of 10.2 N. m (bucket) = ​ (a) Fg (bucket) = ​ (b) Force applied on bucket = ​ (c) Net force on bucket = ​ (d)

Mass is measured in kilogramsm = 1 kgWeight is a force: Fg = mgFg = 1 kg · -9.8 m/s2 = -9.8 NThis is the force down on the bucketThe force up is 10.2 NThe net force is the sum of the forces10.2 N + - 9.8 N or 10.2 N - 9.8 N = 0.4 N

You lift a 4-kg bucket with a force of 50.2 N. What is the net force on the bucket?m (bucket) = ​ (a) Fg (bucket) = ​ (b) Force applied on bucket = ​ (c) Net force on bucket = ​ ​ (d)

Mass is measured in kilogramsm = 4 kgWeight is a force: Fg = mgFg = 4 kg · -9.8 m/s2 = -39.2 NThis is the force down on the bucketThe force up is 50.2 NThe net force is the sum of the forces50.2 N + - 39.2 N or 50.2 N - 39.2 N = 11 N

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Gravity always pulls down on masses and that force is their weight. F_g
I label down forces as negative in these problems.

To find net force, you add the up and down forces together.
Net force = 25 N + - 10 N = 25 N - 10 N = 15 N

To find net force, you add the up and down forces together.
Net force = 15 N + - 8 N = 15 N - 8 N = 7 N

To find net force, you add the up and down forces together.
Net force = 20 N + - 5 N = 20 N - 5 N = 15 N

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 3-kg bucket with a force of 50 N. The weight of the bucket is -29.4 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 2-kg bucket with a force of 40.4 N. The weight of the bucket is -19.6 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

The force up is 40.4 and the force down is
-19.6 N.
Add these to get the net force.
40.4 + - 19.6 N = 40.4 - 19.6 = 20.8 N
To get net force, always add up to down and left to right.

You lift a 1-kg bucket with a force of 10.2 N.
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

Mass is measured in kilograms
m = 1 kg
Weight is a force: F_g = mg
F_g = 1 kg · -9.8 m/s² = -9.8 N
This is the force down on the bucket
The force up is 10.2 N
The net force is the sum of the forces
10.2 N + - 9.8 N or 10.2 N - 9.8 N = 0.4 N

You lift a 4-kg bucket with a force of 50.2 N. What is the net force on the bucket?
m (bucket) = (a) F_g (bucket) = (b) Force applied on bucket = (c) Net force on bucket = (d)

Mass is measured in kilograms
m = 4 kg
Weight is a force: F_g = mg
F_g = 4 kg · -9.8 m/s² = -39.2 N
This is the force down on the bucket
The force up is 50.2 N
The net force is the sum of the forces
50.2 N + - 39.2 N or 50.2 N - 39.2 N = 11 N