Forces Cause Change

What happens to an object at rest if the forces applied to it are equal but act in opposite directions?

• The object will move in another direction.

• The object will not move.

• The object will accelerate.

• The object will move at a constant speed.

Tags

NGSS.MS-PS2-2

Graham has two large toy cars. His red car has a higher mass than his blue car. How can he push both of them to make them move at the same speed?

• He can push them for the same amount of time, but he will have to push the blue car with more force.

• He can push both of them with the same force for the same amount of time.

• He can push them for the same amount of time, but he will have to push the red car with more force.

• He can push with the same force, but he will have to push the blue car for a longer time.

Tags

NGSS.MS-PS2-2

Stefano and Elan are racing side-by-side on identical one-speed bikes. Elan starts to apply more force to his pedals than Stefano. What is most likely happening?

• Elan is increasing the force of gravity against his bike.

• Elan is allowing friction to slow him down.

• Elan is starting to go faster than Stefano.

• Elan is getting tired.

Tags

NGSS.MS-PS2-2

For a fundraiser at Gateway Elementary, four 5th Graders are helping to move boxes full of items on carts. Assuming the floor is the same and that the students all pull with the same force, whose box will travel the shortest distance in 10 seconds?

Angley's Box - 25 g.

Briana's Box - 22g.

Christopher's Box - 20 g.

Danisha's Box - 15g.

• Angely's Box

• Briana's Box

• Christopher's Box

• Danisha's Box

Tags

NGSS.MS-PS2-2

Four 5th Graders moved identical carts along the floor for the same number of seconds. Two students pushed the carts and the other two students pulled the same carts.

Kayla pushed with the smallest force.

Greyson pulled with 2 times more force than Jasmine.

Ian pulled with 3 times more force than Jasmine.

Kenneth pushed with 5 times more force than Jasmine.

Which student's cart moved the farthest?

• Kayla's cart

• Greyson's cart

• Ian's cart

• Kenneth's cart

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

Which object needs the greatest force to put it in motion?

• a train

• a NASA rocket ship

• a car

• a bike

Tags

NGSS.HS-PS2-1

Mrs. Druskis saw a package on the table. She tried to lift it, but it did not move. What can she conclude from this?

• The force from gravity acting on the object was equal to the upward force she was applying.

• She is applying more upward force to the package than its weight is applying downward.

• The friction between her hands and the package is preventing her from lifting the package.

• The package's weight and the table are applying more downward force on the package than she is applying upward.

Tags

NGSS.MS-PS2-4

Nathan is experimenting with toy cars of different sizes and masses. He pushes each car with the same force for the same amount of time and then lets go. Which car travels fastest?

Red Car - 4g

Blue Car - 2g

White Car - 5g

Black Car - 3g

• Red Car

• Blue Car

• White Car

• Black Car

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Two 5th Graders pushed identical boxes across the floor. Jazlyn pushed her box with twice as much force as Dariana pushed hers. What happened to the boxes?

• Jazlyn's box did not move at all.

• Dariana's box moved faster and farther than Jazlyn's.

• Both boxes moved at the same speed and for the same distance.

• Jazlyn's box moved faster and farther than Dariana's.

Tags

NGSS.3-PS2-1