What direction does the frictional force act?

static friction-not moving; kinetic friction-moving

Explain the two types of friction

static friction-not moving; kinetic friction-moving

Which type of friction requires more force to overcome?

static friction-not moving; kinetic friction-moving

What is a Free-Body Diagram?

It models the forces acting on an object

It models the object acting on forces

What is Newton’s 1st Law of Motion?

Every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it.

tendency of any object to maintain its state of rest or of uniform velocity in a straight line (meaning whatever motion the object was doing, it will continue to do that motion).

What is another name for this law?

Every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it.

tendency of any object to maintain its state of rest or of uniform velocity in a straight line (meaning whatever motion the object was doing, it will continue to do that motion).

What is the definition of Inertia?

tendency of any object to maintain its state of rest or of uniform velocity in a straight line (meaning whatever motion the object was doing, it will continue to do that motion).

Every object continues in its state of rest, or of uniform velocity in a straight line, as long as no net force acts on it.

How are force and acceleration related?

Force and acceleration are directly related (proportional) to each other (they do the same thing

Force and acceleration are inversely related to each other

Mass and acceleration are inversely proportional to each other (they do the opposite of each other)

How are mass and acceleration related?

Mass and acceleration are inversely proportional to each other (they do the opposite of each other)

Force and acceleration are directly related (proportional) to each other (they do the same thing

Force and acceleration are inversely related to each other

What is an action-reaction pair?

for every action force there is an equal (in size) and opposite (in direction) reaction force.

two forces exerted upon two different objects

Newton’s 3 Law involves how many objects and how many forces?

two forces exerted upon two different objects

for every action force there is an equal (in size) and opposite (in direction) reaction force.

What does simultaneous mean?

for every action force there is an equal (in size) and opposite (in direction) reaction force.

two forces exerted upon two different objects

How would you answer the following? As an object falls toward Earth,

The upward acceleration of Earth is negligible because of its large mass.

The object does not exert a force on Earth.

The object exerts a downward force on Earth

Newton’s 3rd law does not apply

Which of the following is true about balanced forces?

They do not change the motion of an object

They cause an object to start moving

They cause an object to stop moving

They always act in the same direction

What is the primary effect of unbalanced forces acting on an object?

The object moves in a circular path

The object's velocity remains constant

Which of the following is a characteristic of force?

It can either push or pull objects

Which of the following would increase the friction between two surfaces?

Increasing the force pushing the surfaces together

Adding a lubricant between the surfaces

Forces Unit Review

Authored by DANIELLE COLLINS

Science

6th - 8th Grade

NGSS covered

Used 12+ times

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45 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the 3 ways an object can accelerate?

Speed up

Slow down

Change Direction

All of the above

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What causes an acceleration?

Constant Force

Variable Force

No Force

What is the SI Unit that Force is measured in?

N(newton)

newton=kg*m/s²

gravity, electricity and Magnetism

friction and normal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a Newton equivalent to?

N(newton)

newton=kg*m/s²

gravity, electricity and Magnetism

friction and normal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are examples of Field Forces?

N(newton)

newton=kg*m/s²

gravity, electricity and Magnetism

friction and normal

What are examples of Contact Forces?

N(newton)

newton=kg*m/s²

gravity, electricity and Magnetism

friction and normal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is Friction a Contact or a Field Force?

Contact

Field

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