Force Motion Kinetic Potential

Penny has two dogs names Fluffy and Butch, shown above.

Penny also has two identical wagons. She puts one dog in each wagon and pushes each wagon with the same amount of force. The wagons travel in a straight line on level ground. Which of the following statements best compares the motion of the two wagons?

• Fluffy's wagon will move faster.

• The wagons will both move in the same way.

• Fluff's wagon will stop first.

• Butch's wagon will move faster.

Tags

NGSS.MS-PS2-2

Which of the following statements is true?

• Balanced forces do not cause a change in motion.

• Unbalanced forces do not cause a change in motion

• Gravity always causes a change in motion.

• . Balanced forces always cause a change in motion.

Tags

NGSS.MS-PS2-2

When James works in his workshop, he often gets a lot of water on the floor. This water makes the floor slippery. What can James do to increase the amount of friction on the floor and decrease his chance of slipping?

• put a thin coat of oil on the floor

• polish the floor to make it smooth

• clean the floor thoroughly every day

• add a bumpy surface to the floor

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which of the following statements is true?

• An object moving in a straight line will eventually change direction on its own.

• Moving objects stay in motion until acted on by another force.

• Objects at rest eventually begin to move.

• Moving objects will eventually stop moving on their own.

Satter and Carrie are playing catch with a football. Satter has just thrown the ball straight toward Carrie. While the ball is in the air, a strong gust of wind blows the ball away from Carrie.

What caused the ball to move away from Carrie?

• the balanced force of wind

• the unbalanced force of wind

• the balanced force of gravity

• the unbalanced force of gravity

Tags

NGSS.MS-PS2-2

Which of the following best illustrates a use of friction in the transportation industry?

• When a car towing a trailer accelerates, the trailer accelerates at the same rate.

• When a ship is launched out to sea, the downward force of the ship onto the water is balanced by the water's upward force onto the ship.

• When a locomotive's brakes are applied to its wheels, the force between the brakes and the wheels causes the locomotive to slow down.

• When a passenger jet burns fuel and shoots exhaust out its back end, the jet responds by moving forward.

A cup begins sliding across the top of a table. An unbalanced force caused it to start moving. Which is an example of an unbalanced force that could be causing the movement?

• the force of the table pushing upward on the cup

• the friction of the table top

• gravity keeping the cup on the table

• someone pushing the cup

Tags

NGSS.MS-PS2-2

Jacob rolls a toy truck across a wood floor and onto a carpet.

How will the motion of the truck most likely change when it rolls onto the carpet?

• The truck will speed up.

• The truck will slow down more quickly.

• The truck will move at the same speed.

• The truck will spin in circles.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Mrs. Norton set a block of wood on a long wooden ramp. The block did not slide down the ramp because friction held it in place. Mrs.Norton told her students to design ways to reduce the friction between the block and the ramp.

Each student was given an identical wooden block and ramp. Their designs were tested by timing how long it took each block to reach the bottom of its ramp. Some of the students' solutions are shown in the table above.

Whose design was the most successful?

• Matthew's

• Rita's

• Juan's

• Ivy's

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Marc and Rick are pushing on opposite sides of a box. Marc pushes with a force of 5 N. Rick also pushes with a force of 5 N. In what direction will the box move?

• The box will move up because the forces will combine together.

• The box will not move because the forces are balanced.

• The box will move toward Rick because Marc is pushing with more force.

• The box will move toward Marc because Rick is pushing with more force.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2