Newton's Laws
Vocabulary
Forces
Speed & Acceleration
Weight vs mass
100
An object in motion stays in motion and an object at rest stays at rest unless acted upon by an outside force.
Newton's First Law
100

How fast an object is traveling

Speed

100
Is a push a force?
Yes
100
What is the formula for speed?
distance รท time
100
My mass would change if I went to a different planet. True or False
False
200
Force = Mass x Acceleration is which law?
Newton's Second Law
200

Formula to find speed

distance/ time

200

An object 5 kg is traveling with an acceleration of 200m/s2 . What is the force in Newtons?

F=ma

F=ma

F=5 kg x 200m/s2

F=1000 Newtons
200
If I traveled 100 miles in 2 hours, what was my speed?
50 mi/hour
200
My weight would stay the same if I traveled to a different planet. True or False?
False - your weight would CHANGE!
300
Every action has an equal and opposite reaction.
Newton's Third Law
300

A downward force at 9.8 m/s2 on Earth

Gravity

300

Calculate the acceleration of a 4 kg bag of flour if it has a total force of 12 Newtons.

acceleration= force/ mass

a= F/m

a=12N/4 kg

a= 3 m/s2


300

A car goes 300 km in 5 hrs.  What is its speed?

Speed= distance/time

Speed= 300/5hr= 60 km/hr

300
Is it easier to stop a moving object that has MORE mass or LESS mass?
It's easier to stop a moving object with LESS mass.
400
Wearing seat belts to protect passengers when a car stops quickly is an example of which law?
Newton's First Law
400

The rate at which velocity (direction or speed) changes over time

Acceleration

400

This object shows how energy can be transferred from one ball to the next in a pendulum of six balls on a string.


Newton's cradle

400

What is the mass of an object if it is travelling at 210 m/s2 with a force of 16 N?

mass= Force/ a

mass= 16 N/ 210m/s2

mass in kg= 0.076 kg

400
Weight is the downward force of an object. True or False
True
500
If I am sitting in my chair, gravity pushes down on me. What is the opposite and equal force in this scenario?
The chair pushing UP on me.
500

What is the formula for kinetic energy?

KE= 1/2mv2

500
What type of force slows down a skateboarder when he puts his foot down to brake?
Friction
500

What was created in cars to prevent humans from hitting the windshield with force? Name 3 things.

crumple zone

front air bag

side air bags

seat belt

500

You have a mass of 75 kg on Earth.  On the moon, the gravity is 1.62 m/s2.  What is the weight force you experience on the moon?   F= m x a

F= mass x a

F= 75 x 1.62m/s2

F= 121.5 Newtons

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