Forces and Motion Review

John pushed two identical toy cars across the same flat smooth floor. Why did both cars travel the same distance?

• because he applied different forces to the two cars

• because he pushed the cars at the same time

• because he applied the same force to each of the two cars

• because he pushed the cars at different times

As Chris and his dad add items to their shopping cart, which will most likely occur?

• The cart will become easier to move because the items will increase the mass of the cart.

• The cart will become more difficult to move because the items will increase the mass of the cart.

• The cart will become more difficult to move because the items will decrease the mass of the cart.

• The cart will become easier to move because the items will decrease the mass of the cart.

Tags

NGSS.MS-PS2-2

Katie was pulling a sled with her puppy in it. Katie’s sister then got into the sled with the puppy. How would the sled’s speed most likely change after Katie’s sister got into the sled?

• The speed would decrease due to the change in mass.

• The speed would decrease due to the change in gravity.

• The speed would increase due to the change in mass.

• The speed would increase due to the change in friction.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

How fast was a train moving if it traveled 100 meters in 10 seconds? (speed = distance ÷ time)

• 90 meters per second

• 100 meters per second

• 1 meter per second

• 10 meters per second

Chris climbs onto a skateboard ramp halfway between the top and the bottom of the ramp. Because gravity acts on Chris, which is most likely to happen?

• He won’t move.

• He will roll down the ramp.

• He will float above the ramp.

• He will roll up the ramp.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Ana is pushing a wheelbarrow of rocks. She stops and unloads half of the rocks. How will this effect the force needed to move the wheelbarrow?

• Gravity is decreased, making the wheelbarrow harder to move.

• Gravity is increased, making the wheelbarrow easier to move.

• Mass is decreased, making the wheelbarrow easier to move.

• Friction is increased, making the wheelbarrow harder to move.

Tags

NGSS.MS-PS2-2

Which surface would have the most amount of friction?

• A road

• Carpet

• An ice skating ring

• Astro turf

Luke and Sarah have an assignment to construct an experiment that shows how the amount of force needed to accelerate an object is proportional to its mass. Which answer would BEST describe the motion of the cart, assuming there is no friction?

• The cart will move to the left at a constant speed.

• The cart will move to the right at a constant speed.

• The cart will accelerate (increase speed) to the left.

• The cart will accelerate (increase speed) to the right.

Tags

NGSS.MS-PS2-2

A student is conducting an experiment to determine what will happen to the gravitation force of two boxes, with different masses, if the boxes are pushed together. One box has a mass of 100 g and the other box has a mass of 150 g. What will happen if these two boxes were moved closer together?

• gravitational force would remain constant

• gravitational force would not be created

• gravitational force would decrease

• gravitational force would increase

Tags

NGSS.MS-PS2-4

Assuming both players are on the same surface and are wearing the same kind of shoes, who will win the game and why?

• Mason will win because although he is applying less force than William, he is smaller and can move faster than William.

• Mason will win because the unbalanced forces applied by Mason and William will cause William to move toward Mason.

• William will win because the unbalanced forces applied by Mason and William will cause Mason to move toward William.

• William will win because he is applying more force than Mason so he is larger and can mover faster than Mason.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2