Forces and Motion (LR)

Students investigate how the force of the wind affects the movement of equal-sized balls that have different masses.

As students watch, a wind blows equally on all of the balls. When the wind stops, students draw a picture of their results.

Based on the results, what should the students conclude?

• Balls move easily when their mass is higher.

• Balls move farther when the wind speed is lower.

• Balls move farther when their mass is lower.

• Balls move quickly when their size is larger.

Tags

NGSS.MS-PS2-2

Based on the following text, select the best 2 response that answers the following question:

Why did it get harder to maneuver my cart throughout my shopping trip?

I was grocery shopping for the month. At the beginning, when my cart was almost empty, it was really easy to push. But by the end of my trip, when the shopping cart was full of stuff, it became very difficult for me to move the cart. I couldn't fit anything else so I decided to go to pay at the register. I had to make a ninety-degree turn to get in line, but the cart was so full that I couldn't complete the turn.

• According to Newton's 2nd Law, the more mass an object has, the more force required to move it.

• According to Newton's 3rd Law, for the action of pushing the cart, there is an equal and opposite reaction.

• Turning the cart caused a balanced force resulting in motion

• Gravity pushing the cart in the direction of the register

Tags

NGSS.MS-PS2-2

The diagram shows two fans blowing air on a ball.

What is the net force acting on the ball?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The model shows a force acting on a car. The amount of the force is represented by the size of the arrow.

A second force is applied to the car. As a result, the car's motion stops changing.

Which of the following models best represents the forces acting on the car as the second force is applied?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Students push with opposite forces on the sides of a toy wagon.

Which of the following explains the change in the wagons motion?

• The ball will move to the left because the forces are unbalanced.

• The ball will move to the left because the forces are balanced.

• The ball will move to the right because the forces are unbalanced.

• The ball will move to the right because the forces are balanced.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The diagram below shows some positions in the path of the pendulum swinging from a fixed point called a fulcrum. The pendulum is raised to the start point and released. What could the student do to change the pattern of the pendulum?

• If the student increases the mass of the pendulum, the pattern will change.

• If the student changed the length of the pendulum, the pattern will change.

• If the student decreases the mass of the pendulum, the pattern will change.

• If the student changes the release angle of the pendulum, the pattern will change.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Liza tied a ball to a long string and then tied the string to a hook on the ceiling.

Then Liza pulled the ball to Place A and let it go. The ball began to swing Liza made a chart to show where the ball was each second after she let the ball go.

Predict where the ball will be when the time is 5 seconds.

• between Place A and Place B

• Place B

• between Place B and Place C

• Place C

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

The picture shows a carousel. The carousel spins while the horses move up and down. A student determines that each horse completes one up-down cycle in 30 seconds. The student rides a horse on the carousel for 2 minutes, which equals 120 seconds.

How many times did the student riding the horse complete an up-down cycle?

• 5 times

• 2 times

• 3 times

• 4 times

A student is swinging on a swing. The table shows data on the positions of the student during six seconds.

Which TWO predictions show where the student will be if the pattern continues?

• 7 second = Point Y

• 9 seconds = Point X

• 10 seconds = Point X

• 8 seconds = Point Z

• 11 seconds = Point Y

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Ava's mother pushed her backward on the swing.

Predict how Ava will move.

• She will move backward and then stop.

• She will move toward her mother.

• She will move back and then forward to where she started and then stop.

• She will move back and then forward and keep swinging.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2