Forces and Motion Basics PhET: Motion and Friction

Click the Motion Section of the Simulation Lab and Apply a Force to the box using the slider at the bottom. What happens when you apply a continuous force to the box?

• The box slows down.

• The box moves at a constant speed.

• The box speeds up.

• The box remains stationary.

Tags

NGSS.MS-PS2-2

With the box moving adjust the force to zero. What happens to the box?

• The box continues moving forever.

• The box slows down and stops.

• The box speeds up.

• The box moves backward.

Tags

NGSS.MS-PS2-2

Apply more force on the box. What happens to the motion of the box? (Make sure the speed box is checked.)

• The box accelerates.

• The box decelerates.

• The box stays still.

• The box rotates in place.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Under the Friction Tab: Place the box on the surface and observe. What force is acting on the box when it is at rest?

• No force is acting.

• Gravity is acting downward.

• Friction is acting upward.

• The box is pushing the surface upward.

Tags

NGSS.MS-PS2-4

Observe the box on a flat surface. Which force prevents the box from falling through the surface?

• Gravity.

• Normal force.

• Friction.

• Applied force.

Start with just the box and apply a force. Observe what happens for 5 seconds then increase the mass of the box and apply the same force. What happens to the box’s acceleration?

• Acceleration increases.

• Acceleration decreases.

• Acceleration remains the same.

• Acceleration stops completely.

Tags

NGSS.MS-PS2-2

Stop Applying Force to the box. What happens to the velocity of the box?

• The velocity increases.

• The velocity decreases.

• The velocity stays constant.

Tags

NGSS.MS-PS2-2

What effect does friction have on the motion of the box?

• Friction makes the box move faster.

• Friction slows the box down.

• Friction keeps the box at constant speed.

• Friction has no effect on the box.

Tags

NGSS.MS-PS2-2

Decrease the friction to zero and apply a push to the box. What happens when you stop pushing the box?

• The box stops immediately.

• The box slows down and stops.

• The box keeps moving at the same speed.

• The box speeds up.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Increase friction to the maximum value. What happens to the box when you apply a small push?

• The box moves easily.

• The box remains stationary.

• The box moves quickly then stops.

• The box slides with constant speed.

Tags

NGSS.MS-PS2-2