Show:
Forces and Motion 1
Forces and Motion 2
Forces and Motion 3
Forces and Motion 4
Forces of Motion
100
This happens to an object when it has positive acceleration.
What is speeding up?
100
A push or a pull exerted on an object is called this.
What is Force?
100

A baseball thrown into the air will continue on its path until which force(s) acts upon it. 

gravity and air resistance

100

Who discovered the Law´s of motion?

SIR Isaac Newton

100

A change in direction results in a change in speed.

TRUE or FALSE

FALSE

200
This is happening to an object when it has negative acceleration.
What is slowing down?
200

This is the what gravity acts on to give an object its weight

What is Mass?

200

A change in the gravitational force acting on an object changes its...

What is Weight?

200

A parachute works to do this so that you don't crash and get hurt.

Increase air resistance

200

DOUBLE POINTS

STATE THE 1st LAW of MOTION - give an example

An object at rest remains at rest. An object in motion goes at constant speed until an outside force acts upon it.


Back pack on ground - ball on ground - kicked

300
In absence of acceleration, a moving object has a constant this.
What is Speed?
300

DAILY DOUBLE!! ANSWER BOTH PARTS FOR DOUBLE POINTS!!!

A 20 kg ball and a 50 Kg ball rest at the top of a ramp. Which has greater force?

They are both at rest so it is the same

300
The force that pull a falling leaf towards earth is called this.
What is Gravity?
300

The larger the mass, the bigger this force is

Gravity

300

What is the 2nd law of motion?

Also give the formula for mass 

DOUBLE POINTS - GIVE AN EXAMPLE

The force of an object increases with an increase in mass and/or acceleration 

FORCE=MASS X ACCELERATION


Punting a football

400

A toy car is released at the top of an INCLINED PLANE. What force initiates its motion?

gravity

400
The tendency of an object to resist a change in its motion is known as this.
What is Inertia?
400
The force that is applied to an object by a person is called this.
What is Applied force?
400

An object with a balanced net force is doing this

What is resting?

400

What is the 3rd LAW of Motion?


DOUBLE POINTS - GIVE AN EXAMPLE

For every action there is an equal an opposite reaction! 


2 objects collide -- both will react to the other 

500
Moving parts in machinery are coated in oil and grease to reduce this.
What is Friction?
500

What is the difference between weight and mass?

What is mass is a measurement of matter?

What is weight factors in gravity?

500

What is the force that is pushing up on a book that is sitting on a desk?

What is the NORMAL FORCE?

500

A ball rolls on a carpet. The ball experience friction as it rolls. How will friction affect the ball´s motion?


The ball experiences an unbalanced force and will slow down

500

Because of the 3rd law of motion... If both objects are thrown with the same force, which would move back further after they collided - a 145g baseball or a 45g golf ball

EXPLAIN WHY? What is conserved during this interaction?

Golf ball - Because the smaller the mass - the greater the acceleration

momentum