Newton's Laws
Speed
Friction
Movement and Forces
Vocab
100

An object’s motion will not change unless a(n) ___ force is applied.

Unbalanced.

100

What is the formula for speed?

speed=distance/time

100

What is Friction?

The force that opposes motion between two surfaces that are in contact.

100

A vector quantity has BOTH of what?

Magnitude and Direction.

100

What is weight?

The gravitational force acting upon an object

200

Which one of Newton’s laws applies to everyday life?

ALL of them! Especially Newton’s Second Law… example - stopping something from rolling off a table.

200

What is instantaneous speed?

The speed of an object at a particular moment in time.

200

What is the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest?


Static Friction

200

What is distance?

The amount of ground an object has covered. It is a scalar quantity as well.

200

What is the definition of free-fall?

When Earth's gravity is the only force acting on an object

300

What are the TWO equations of Newton’s Second Law?

Net Force = mass / acceleration and F = ma

300

What is the formula for acceleration?

Final speed - initial speed divided by time

300

What are the four types of friction?

Kinetic, Sliding, Rolling, and Static

300

An example of a contact force is ___

Friction.

300

What is a Balanced Force?

 

A force that has a net force of zero and causes an object to stay at a constant speed while in motion. It will also cause an object to stay at rest if forces are balanced.

400

Which Newton’s law does inertia apply to?

Newton’s First Law.

400

What is the formula for average speed?

Total distance/ time

400

What are the three things that affect friction?

Surface roughness, force pushing objects together, and Surface area

400

The equation of net force is ___

mass times acceleration.

400

What is the definition of terminal velocity?

When an object falls at a constant velocity because the air resistance and gravitational force balance out

500

You and your classmates are playing tug-of-war. You’re pulling with all your strength and realize that both sides of the rope aren’t moving. Which one of Newton’s laws does this occurrence apply to?

Newton’s Third Law.

500

What are the three types of speed and the two types of acceleration?

Instantaneous speed, Average speed, Constant speed, Centripetal acceleration, and Constant acceleration

500

What is kinetic friction?

The force that opposes the movement of two surfaces that are in contact and are moving over each other.

500

Is displacement a vector quantity or scalar quantity?

Vector.

500

What is the definition of frame of reference?

A system for describing the motion of an object relative to the objects around it