Přejít k hlavnímu obsahu
Přihlásit se
Sign up for FREE
arrow_back
Knihovna

Copy of 11.) Forces Simulation (5/28/2026)

star
star
star
star
star
Poslední aktualizace about 1 month ago
19 Dotazy
Part 1 - Net Force
1
1
1
1
Part 2 - Friction
1
Otázka 1a
1a.

Before you attempt the Net Forces simulation:

  • Predict what must be true for the blue team to beat the red team at tug of war.

  • Use terms, such as, "force," in your answer.

Directions:

  1. Click, "Net Force" in the simulation below.

  2. In the menu at the top of the simulation, check the boxes for “Sum of Forces”, “Values”, and “Speed”.

  3. Answer the below questions.

1
Otázka 1b
1b.

What is “Sum of Forces” (what is the other name for this)?

1
Otázka 1c
1c.

What is the sum of forces when there is no one pulling on the rope?

Remember, the units for force are Newtons (N).

1
Otázka 1d
1d.

Explain how the sum of forces is calculated when there are opposing forces.

In the simulation:

  • Place one small blue person on the left side - it must be small.

  • Answer the questions below the simulation.

Otázka 2a
2a.

One small blue person on the left side.

How much force is being applied (include direction and units)?

Otázka 2b
2b.

Move the blue person to each knot on the left side of the rope and observe for changes in the force being pulled.

Does the force change when you move the blue person to other knots?

Otázka 2c
2c.

Click "Go!" Which direction does the cart move?

Otázka 2d
2d.

Describe what happens to the speed of the cart as it is being pulled?

In the above simulation, click "Net Force".

In the menu to the upper-right, click, "Sum of Forces," "Values," and "Speed."

On the rope:

  • Left side - place one small blue person - it must be small.

  • Right side - place one medium red person - it must be medium.

1
Otázka 3a
3a.

What is the new sum of forces (include direction and units):

1
Otázka 3b
3b.

Click, "Go!" Which direction does the cart move?

1
Otázka 3c
3c.

Explain why the cart moves that way.

4
Otázka 3d
3d.

Describe two scenarios when the cart will not move when you click "Go!" and explain why.

Click on the “Friction” section of the simulator.

  • In the menu in the upper-right, select, "Forces," "Sum of Forces," "Values," "Masses," and "Speed."

  • Apply the variables to the simulation as described in each row of the below table.

  • As the simulation runs for each set of variables, observe for and record the friction force and sum of forces in the table.

  • To run the simulation, slide the "Applied Forces" control all the way to the right, up to 500 N.

6
Otázka 4a
4a.
1
Otázka 4b
4b.

When the friction is set to "None" were their any frictional forces?

Were the frictional forces constant when the friction was set to "Medium" and "High"?

1
Otázka 4c
4c.

Look at the friction forces data for when the friction was set to "Medium". What is the impact on friction as the mass of the object is increased?

1
1
1
Otázka 4f
4f.

Complete the following for the "Medium" and "High" friction categories:

As mass increased, the frictional forces .

As mass is decreased, the frictional forces .

5

Mass/Object

Friction Level

Applied Force

Friction Forces

Sum of Forces

50 kg (box)

None

500 N Right

100 kg (trashcan)

None

500 N Right

150 kg (trashcan + box)

None

500 N Right

200 kg (refrigerator)

None

500 N Right

50 kg (box)

Medium

500 N Right

100 kg (trashcan)

Medium

500 N Right

150 kg (trashcan + box)

Medium

500 N Right

200 kg (refrigerator)

Medium

500 N Right

50 kg (box)

Lots

500 N Right

100 kg (trashcan)

Lots

500 N Right

150 kg (trashcan + box)

Lots

500 N Right

200 kg (refrigerator)

Lots

500 N Right

Otázka 4d
4d.

Look at the friction forces data for when the friction was set to "High". What is the impact on friction as the mass of the object is increased?

Otázka 4e
4e.

Did you see the same phenomenon related to mass and friction forces that was observed in the "Medium" and "High" friction categories in the "No Friction" category? Why do you think this was so?

Otázka 4g
4g.

Newton's First Law of Motion, also known as the Law of Inertia, states that an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity in a straight line unless acted upon by an external, unbalanced force.

Where in this lab could this be observed?