Force

Students attach a balloon to a straw and then tape the straw to the top of a toy car. The students inflate the balloon and release the car. The car travels 40 centimeters across the floor.

What should the students do to determine whether the force of the air from a balloon is enough to push the car 40 centimeters across the same floor in repeated trials?

• A) Test the car several times using an identical balloon filled with different amounts of air

• B) Test the car several times using different-sized balloons filled with the same amount of air

• C) Test the car several times using an identical balloon filled with the same amount of air

• D) Test the car several times using different-sized balloons filled with different amounts of air

Tags

NGSS.MS-PS2-2

The diagrams show two trials of an experiment in which a spring scale was used to measure force. What can this experiment be used to determine?

• how mass affects the force needed to move objects

• how force affects the mass of two objects

• how the force used to pull a dictionary affects the mass of a box of marbles

• how the mass of a box of marbles affects the mass of a dictionary

Tags

NGSS.MS-PS2-2

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer?

• How do blocks of different sizes react to force?

• How do different surfaces affect the amount of force needed to move a block?

• How do blocks affect spring scales?

• How does the mass of a block change when it is pulled across a desk?

Tags

NGSS.MS-PS2-2

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 below. Which of these is most likely Step 3 in the student's experiment?

• 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.MS-PS2-2

Rube Goldberg was an artist who drew cartoons that showed a very complicated way to do a simple task. The picture below shows a cartoon like the ones Goldberg drew.

Which form of energy is used to turn on the switch?

• Light energy

• Thermal energy

• Electrical energy

• Mechanical energy

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Fill in the blank: The switch turns on when the _______ moves up.

• hand

• foot

• lever

• button

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student made a list of activities that involve energy. Which activities on the list are examples of the use of mechanical energy?

• Activities 1, 4, and 6

• Activities 2, 4, and 5

• Activities 1 and 2

• Activities 3, 5, and 6

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height, they measure the depth of the dent the ball makes in the clay. Why is the depth of the dent different in each trial?

• The size of the ball changes.

• The material of the ball changes.

• The mass of the ball when it hits the clay changes.

• The force of the ball when it hits the clay changes.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When a bat searches for prey at night, it makes sounds as it flies, and it uses the sounds' echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using:

• A) thermal energy and light energy

• B) sound energy and thermal energy

• C) mechanical energy and sound energy

• D) light energy and mechanical energy

Tags

NGSS.MS-PS4-2

The two pictures show part of an investigation. A magnet, a book, and a paper clip are on a sheet of lined paper. In Picture 1 a student slides a magnet closer to the book. The student holds the book still in both pictures. Which statement about this investigation can be supported by the result shown?

• A) Work was done on the magnet, the book, and the paper clip

• B) Work was done on the magnet and the paper clip only.

• C) Work was done on the magnet and the book only.

• D) Work was done on the magnet only.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5