What is a pattern of motion?

• A motion that is random

• A motion that repeats

• Any typr of regular force

What is friction?

• Friction is another word for a pushing and pulling force. It speeds things up.

• Friction is the force that pulls objects down to the surface of the Earth.

• Friction is the force that resists motion. It slows things down.

Explain the relationship between string length and motion for pendulums.

• The longer the string length, the faster a pendulum swings. The shorter the string length, the slower a pendulum swings.

• The longer the string length, the slower a pendulum swings. The shorter the string length, the faster a pendulum swings.

• There is no difference between the string length and motion for pendulums

The ball is rolling away from Jason before he blows on it. Select the BEST prediction for what will happen to the ping-pong ball after Jason blows on it.

• A. It will speed up.

• B. It will slow down.

• C. It will start moving.

• D. It will not move.

• E. It will change direction.

Tags

NGSS.MS-PS2-2

The ball is rolling toward Jason before he blows on it. Select the BEST prediction for what will happen to the ping-pong ball after Jason blows on it.

• A. It will speed up.

• B. It will start moving.

• C. It will not move.

• D. It will slow down.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The ball is rolling across the table before Jason blows on it. Select the BEST prediction for what will happen to the ping-pong ball after Jason blows on it.

• A. It will speed up.

• B. It will change direction

• C. It will not move.

• D. It will slow down.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

WHY is Lisa able to PREDICT how her cousins will be moving in the future?

• A. Lisa observes that one swing is shorter than the other.

• B. Lisa observes that Beth moves farther than Jenny does.

• C. Lisa observes that the motion of each swing happens in a pattern.

• D. Lisa observes that Beth moves back and forth more times than Jenny does.

Tags

NGSS.3-PS2-2

During Experiment 1, a student pushes car X much closer to the center of the seesaw.  Which statements BEST predict what will happen to the forces and motion as soon as car X starts to move?  Select the TWO correct answers.

• The seesaw will begin to tilt.

• The seesaw will stop moving and be flat.

• The forces on the seesaw will become balanced.

• The forces on the see saw will become unbalanced.

• The seesaw will move up and down in a repeated pattern.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

After school, two students with the same mass (weight) sit on on opposite sides of a seesaw on the playground. They want to repeat Experiment 1.    How can the students cause the forces on the seesaw to become balanced?

• Both students can push up and down on the seesaw.

• One of the students can move to the center of the seesaw.

• The students can ask a friend to sit on the left side of the seesaw.

• The students can each sit at the same distance from the center of a seesaw.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which statement BEST predicts how the ruler will move after a few minutes have passed? These two cars have the same mass (weight).

• The ruler will stop moving, with car X's side of the ruler tilted downward.

• The ruler will tilt up and down faster than when first pushed.

• The ruler will move more slowly and stay more flat than when first pushed.

• The ruler will not be moving, and car W's side of the ruler will be sitting on the triangular block.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2