1. Motion, Forces & Machines PowerPoint Presentation

2. Did you ever wonder what powered the rocket or how fast it went?
Both of those questions can be related to motion , forces and mechanics.

3. Speed
The speed of an object is the distance the object travels per unit of time. Speed is a rate which tells you the amount of something that occurs or changes in one unit of time.
Speed=distance over time
Speed can be divided into two subtitles constant speed & average speed.

4. Constant & Average Speed
constant speed is the speed that does not change.
Average speed is the total by time. distance divided

5. Velocity Velocity is Speed in a given direction.
If you know the velocity of an object you know its speed and velocity.
Velocity is a vector quantity. its also “direction-aware”. The direction of the velocity vector is simply the same as the direction which an object is moving. If going downward the velocity is downward. If going upward the velocity is upward.

6. Acceleration
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Acceleration=force over mass

7. Weight & Mass Weight is a measure Mass is an object
Of the force of gravity
On you. Weight is a
Useful measurement
Of how much matter
An object has.
Mass is an object
that will not change
If the force of gravity
on its changes.
mass is a
Useful physical property for
Describing and measuring
matter. The SI unit of mass is
Kilograms.

8. Newton's 1st Law of Motion
An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.  
sometimes referred to as the "law of inertia."
There are two parts one which predicts the behavior of stationary objects and the other which predicts the behavior of moving objects . The two parts are summarized in the following diagram.

9. Example of 1st Law of Motion
Pendulum is a example for Newton's first law
Once its in motion its always in motion.
Once its at rest its always at rest.

10. Newton's 2nd Law of Motion
The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
It explains the relation of force, mass & acceleration.
Force=mass x acceleration
The net force on an object is equal to the product of its acceleration and its mass.

11. Newton’s 3rd Law of Motion
A force is a push or a pull upon an object which results from its interaction with another object.
Action force and reaction force

12. Work, Force , Efficiency, Mechanical Advantage , and Power
Exerting forces on the object than causes the same object to move some direction
To work you must move some distance

13. Force
Is a push or pull
It can be divided into two subtitles unbalanced and balanced
Unbalanced force can cause an object to start moving, stop moving , or change
balanced force is equal forces on an object will change the object motion

14. Example of unbalanced force

15. Mechanical advantage
A machine is a devise witch makes it easier to do work
It changes the amount of force you have to use, the distance you have to move, or the duration you have to go in

16. Efficiency
The efficiency of a machine compares the out put work is to the input work
It is expressed in percent
The higher the percent is the better the efficiency
Efficiency=output work over input work x 100%

17. Power
Is the rate witch work is done for the amount of work done in a unit of time
Power=work over time
Power=force x distance over time
Is a rate witch energy is transformed from one object to another or one form to another

18. Simple & Complex Machines
Simple machines
There are six basic kinds of machines: the inclined plane, the wedge, the screw, the lever, the wheel an axle & pulley.
Complex machines
are two or more simple machines working together
Machines of all types make work easier by changing the size or direction of an applied force.

19. Difference between Powered Vehicles and Rockets
rockets and powered vehicles are both examples of machines

20. Bibliography www.united streaming. COM Physical science textbook