Force, Motion, Energy

Which experiment listed below will best determine how friction affects the speed of a rolling object?

• Roll 3 objects of various sizes across the floor.

• Roll 3 objects of equal size from various heights across the floor.

• Roll 3 objects of equal size across 3 different types of surfaces.

• Roll 3 objects of equal size from equal heights across the floor.

Which word describes a push or pull on an object?

• Position

• Hypothesis

• Mass

• Force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A polar bear slides down an ice covered hill. As he slides, he slows down. Eventually he comes to a stop. What force acts on an object to slow or stop its motion?

• Speed

• Friction

• Gravity

• Direction

A boy applies a pushing force on a ball thrown into the air. What applies a pulling force on the ball at the same time?

• Gravity

• The height of the boy

• Friction

• The mass of the ball

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

To make an object move, it must be pushed or pulled with ____________.

• force

• direction

• gravity

• friction

Tags

NGSS.MS-PS2-2

What is the force that slows down or eventually stops an objects motion?

• Gravity

• Push

• Motion

• Friction

A student observes that the craters on the moon are different sizes. The student designs an experiment to study the formation of craters. The materials for the experiment are marbles and a pan of flour. The student makes a hypothesis that the size of the craters made on the surface of the flour will depend on the height from which the marble is dropped. Some of the steps in the student's experiment are described in the picture. Which of these is most likely Step 3 in the student's experiment? (5.6D)

• Drop the same marble from different heights into the pan of flour

• Drop marbles of different masses from the same height into the pan of flour

• Drop marbles of different sizes from different heights into the pan of flour

• Drop a single marble one time into the pan of flour

Tags

NGSS.3-5-ETS1-3

NGSS.3-PS2-2

A student drops a ball from shoulder height. The ball bounces 5 times before coming to a stop. What force causes the ball to fall to the ground?

• Friction

• Magnetism

• Position

• Gravity

Tags

NGSS.MS-PS2-4

Looking at the picture, what two tools would be needed to measure the effect of friction on the ball?

• Hand lens and balance

• Balance and spring scale

• Measuring tape and stop watch

• Spring scale and hand lens

Students wrap a copper wire around an iron nail and connect the ends of the wire to the battery. The nail attracts other small nails and paper clips as they stick together. What force is being observed?

• The students are observing the force of gravity.

• The students are observing the force of friction.

• The students are observing the force of magnetism.

• The students are observing the force of electricity.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5