STEMSCOPES - Force and Motion

The illustration shows the forces in Newtons (N) acting on three different blocks.

Which blocks will experience a change in motion, or acceleration?

• Blocks 1 and 2

• Blocks 2 and 3

• Blocks 1 and 3

• Blocks 1, 2, and 3

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The illustration shows all the forces in Newtons (N) acting on a box.

The sum of all the forces acting on the box results in a force actingon the box–

• to the right with a strength of 11 Newtons

• to the left with a strength of 7 Newtons

• to the right with a strength of 25 Newtons

• to the left with a strength of 6 Newtons

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Students are investigating how mass affects the force needed to move an object. They attached a wooden block to a spring scale and placed a 10 g mass on top of the block and pulled it 50 cm across the table.

Which of the following changes to their setup would result in a larger force reading on the spring scale?

• Sliding the block 60 cm

• Attaching a larger spring scale

• Using a 20 g mass

• Using a circular piece of wood

Tags

NGSS.MS-PS2-2

Students are using an air rocket to investigate the relationship between force and an object’s motion. Students pump air into the rocket, then release the rocket, and the compressed air pushes the rocket upward.

In order to vary the amount of force acting on the rocket, which of the following should the students change in each trial?

• The length of the hose attached to the pump

• The distance traveled by the rocket

• The amount of air pumped into the rocket

• The height of the rocket from fins to cone

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which investigation will best test the effects of gravity on moving objects?

• a ball slowing down on a flat surface

• a bicycle speeding up on a flat surface

• balloons floating upward from the same height

• pencils falling from the same height

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A man is pushing a ball up a hill. If the man stops pushing the ball and steps out of the way, what will most likely happen to the ball?

• It will continue to roll up the hill.

• It will roll down the hill.

• It will stop on the hill.

• It will roll to the side toward the man.

Tags

NGSS.MS-PS2-2

Which best describes the role friction plays in the operation of a car?

• Friction makes the car go faster.

• Friction keeps the car from stopping.

• Friction helps the car to slow down and stop.

• Friction turns the car in a new direction.

Marcy let a bowling ball and kick ball outside on a windy day. Which best explains why the kick ball moved but the bowling ball did not?

• The kick ball has less mass so it was easier to move.

• The force of gravity acting on the bowing ball is greater.

• The mass of the kick ball is greater so it is easier to move.

• The force of gravity acting on the kick ball is greater.

Tags

NGSS.MS-PS2-2

A helicopter traveled 200 miles in one hour. During the next hour, it traveled abother 200 miles. Which best describes the average speed of the helicopter during the second hour?

• about the same as the first hour

• slower than the first hour

• exactly the same as the first hour

• faster than the first hour

Tags

NGSS.MS-PS3-1

A news truck traveled 60 miles in one hour on Thursday and 240 miles in four hours on Friday. Which best describes the average speed of the truck? (speed = distance ÷ time)

• The truck drove more slowly on Thursday.

• The truck drove mor slowly on Friday.

• The truck drove the same speed on both days.

• There is not enough information to determine the speed.