Force and Motion

Which best explains why a bicycle slows down when its breaks are applied?

• the breaks heat the rubber on the bicycle tires.

• the brakes add energy to the bicycle.

• the brakes increase the force of gravity on the bicycle

• the brakes cause frictional forces on the wheels of the bicycle

Tags

NGSS.MS-PS2-2

A ball is kicked and rolls along a level field until it comes to a stop. What is most responsible for the ball coming to a stop?

• air

• gravity

• mass

• friction

Tags

NGSS.MS-PS3-5

Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

• ball with a mass of 5 kg

• ball with a mass of 10 kg

• ball with a mass of 15 kg

• ball with a mass of 20 kg

Tags

NGSS.MS-PS2-2

Which best describes the speed of a ball as it is thrown straight up into the air and comes back down?

• The ball goes up at a constant speed, stops, then comes down at a constant speed.

• The ball goes up at a constant speed, stops, and increases speed as it comes down.

• The ball goes slower and slower as it goes up, stops, and then goes faster and faster as it goes down.

• The ball goes slower and slower as it goes up, stops, and then comes down at a constant speed.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What can cause a moving object to increase its speed in a forward direction?

• a force pushing on the object from the opposite direction

• a force that continually acts on the object in the direction the object is moving

• an increase in the mass of the object

• a decrease in the mass of the objet

Tags

NGSS.HS-PS2-1

A pencil falls off a desk. What moves the pencil toward the floor?

• mass

• friction

• gravity

• speed

Tags

NGSS.3-PS2-1

NGSS.5-PS2-1

A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop?

• gravity acting on the wagon

• friction acting on the wagon

• the mass of the wagon

• the mass of the child

Tags

NGSS.MS-PS2-2

A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon?

• It would cause the wagon to move faster

• It would cause the wagon to change mass.

• It would cause the wagon to change direction.

• It would cause the wagon to slow down.

Tags

NGSS.MS-PS2-2

What causes a wagon to speed up when going down a hill?

• gravity

• friction

• air pressure

• mass

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Every morning John walks a half mile to school.  One Morning, halfway to school, he stopped to watch a some deer in the field.  When he realized he was late, he ran the rest of the way to school to avoid being late.  Which graph below shows John's speed during his walk to school?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1