Show:
Forces and Motion 1
Forces and Motion 2
Forces and Motion 3
Forces and Motion 4
Forces and Motion 5
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

An apple is falling from a tree. The apple´s speed increases as it falls. How does the apple´s motion affect it´s mechanical energy AND kinetic energy?

Mechanical energy remains the same and its kinetic energy increases. 

100

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

Friction

100

Who discovered the Law´s of motion?

SIR Isaac Newton

100

Energy can be destroyed

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
This is the speed of an object in a specific direction.
What is Velocity?
200
A change in the gravitational force acting on an object is its this.
What is Weight?
200

Name a simple Machine

wheel, axel, pulley inclined plane, ramp

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 Potential Energy? WHY?

50 KG - because it has the GREATER MASS!

300

The 3 ways thermal energy transferred from one object to another?

What is conduction convection and radiation

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

What do simple machines do?

Help change direction or amount of force needed to move an object

300

What is the 2nd law of motion?


DOUBLE POINTS - GIVE AN EXAMPLE

FORCE=MASS X ACCELERATION


Punting a football

400

A toy cr is released at the top of an INCLINED PLANE. How does it´s energy change as it rolls down?

It´s Kinetic Energy Increases, and it's potential energy decreases.

400
The tendency of an object to resist a change in its motion is known as this.
What is Inertia?
400

Thermal energy always moves from _________ to __________?

What is from warmer to colder

400
The force that is applied to an object by a person is called this.
What is Applied force?
400

What is Energy?

The ability to do work

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

A rock setting on the edge of a cliff has what kind of energy?

Potential

500
The rate of change in the velocity of an object is called this.
What is Acceleration?
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?

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