Unit 6 Forces and Motion Review

Ruben slides a book across the floor. Eventually the book will stop moving. What force causes the book to come to rest?

• gravity

• friction

• air resistance

• Ruben’s push

Tags

NGSS.MS-PS2-2

In this experiment, Charlie is using just enough force to keep the car from moving. What type of force is Charlie using?

• pushing

• pulling

• gravity

• friction

Tags

NGSS.MS-PS2-2

Alex drops a box of pins on the floor and the pins scatter. His mother hands him an object that attracts the pins so Alex can pick them up more easily. What force most likely causes the pins to stick to the object?

• gravity

• friction

• electric force

• magnetic force

Tags

NGSS.MS-PS2-5

Kanoa holds two bar magnets as shown in the picture. She can feel a force as she holds the magnets. Which of the following best describes the force she feels?

• Magnetic force pulls the magnets together.

• Magnetic force pushes the magnets apart.

• The two magnetic fields cancel each other out.

• The magnetic fields cause the magnets to heat up.

Tags

NGSS.MS-PS2-5

NGSS.MS-PS2-3

Mr. Sánchez's students are studying forces. They learn that magnetism and gravity are two kinds of forces. How are gravity and magnetic forces alike?

• They never cause changes in motion.

• They do not transfer energy to objects.

• They can act on objects that are not touching.

• They always cause objects to attract each other.

Tags

NGSS.MS-PS2-5

A rocket takes off from Earth. How does the rocket overcome the force of gravity?

• The force of the rocket engine is greater than the force of gravity on the rocket.

• The force of gravity on the rocket is greater than the force of the rocket engine.

• The force of the smoke on the rocket is greater than the force of gravity on the rocket.

• The force of the air pushing on the rocket is greater than the force of gravity on the rocket.

Tags

NGSS.MS-PS2-2

Hao will let go of the car and measure how far it travels in 15 seconds. What change could he make to increase the speed of the car?

• a. use a car that has less mass

• b. decrease the height of the ramp

• c. push on the car as he lets go of it

• d. put sandpaper on the surface of the ramp.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The jet engines of a moving plane exert a force to make the plane travel forward. Which of these increases if the engines exert a greater force?

• a. gravity

• b. mass

• c. pressure

• d. speed

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Anita is bicycling on a flat, straight road. She changes gears, so she needs to use more force. Which of the following best describes the effect of the applied force on the pedals?

• a. The greater the force applied, the slower the bicycle travels.

• b. The greater the force applied, the greater the effect of friction on the bicycle’s speed.

• c. The greater the force applied, the greater the change in the bicycle’s motion.

• d. The greater the force applied, the less effect that mass has on the bicycle’s motion.

Tags

NGSS.MS-PS2-2

Luis and Dan are both pushing on opposite sides of a box. The box is not moving. What must be true about the forces? a. Luis is using more force. b. Dan is using more force. c. Luis’s and Dan’s forces are balanced. d. Luis is pushing against gravity but Dan is not.

• a. Luis is using more force.

• b. Dan is using more force.

• c. Luis’s and Dan’s forces are balanced.

• d. Luis is pushing against gravity but Dan is not.

Tags

NGSS.3-PS2-1