Friction and Surface Type Analysis

In an experiment a person explored how different surfaces affect the amount of friction by sliding a block of wood across smooth, rough, and carpeted surfaces. She measured the force required to pull the block across each surface using a spring scale. The amount of force in Newtons depends on the type of surface.

What is the dependent variable?

• surface type

• friction

• amount of force

• spring scale

In an experiment a person explored how different surfaces affect the amount of friction by sliding a block of wood across smooth, rough, and carpeted surfaces. She measured the force required to pull the block across each surface using a spring scale. The amount of force in Newtons depends on the type of surface.

What is the constant/controlled variable?

• surface type

• friction

• amount of force

• spring scale

In an experiment a person explored how different surfaces affect the amount of friction by sliding a block of wood across smooth, rough, and carpeted surfaces. She measured the force required to pull the block across each surface using a spring scale. The amount of force in Newtons depends on the type of surface.

What is the independent variable?

• surface type

• friction

• amount of force

• spring scale

Tags

NGSS.MS-ETS1-1

In an experiment a claim is made that the more friction a surface has, the higher the force to move across it will be. Which of the following is the correct evidence which would support this claim?

• An icy surface having 1.5 N of force after a wooden block is dragged across.

• A marble surface having 3 N of force after a wooden block is dragged across.

• A carpeted surface having 4.5 N of force after a wooden block is dragged across.

Models in physics can be mathematical equations.

• True

• False

Tags

NGSS.MS-PS4-1

Data in physics is written as a number and a unit.

• True

• False

 A law in physics is the same as a theory, an unknown that

     can be answered with many explanations.

• True

• False

A hypothesis must be proven true for an experiment to be successful.

• True

• False

Tags

NGSS.MS-LS1-5

 In the attached graph for velocity over time of an object, which of the following is the dependent variable.

• 4s - 7s

• velocity (m/s)

• time (s)

• 0s, 0m/s

 Ms. Murray gives a pre-ACT to 4 different groups: a freshman group, sophomore group, junior group, and senior group. She is testing to see which group will complete the ACT in the fastest time. The speed at which the test is completed depends on the student group. Which of the following is the dependent variable?

• the student group

• the speed of the quiz

• the ACT

• Ms. Murray