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“DO NOW” FOR TUESDAY, FEBRUARY 4 TH. WHAT TYPE OF FORCES ARE NECESSARY IN ORDER FOR AN OBJECT TO MOVE? THERE ARE TWO POSSIBLE ANSWERS. “Do Now” for Thursday!. Draw a balanced and an unbalanced force. Illustrate the net force in each drawing. Forces = Pushes & Pulls!.
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“DO NOW” FOR TUESDAY, FEBRUARY 4TH WHAT TYPE OF FORCES ARE NECESSARY IN ORDER FOR AN OBJECT TO MOVE? THERE ARE TWO POSSIBLE ANSWERS.
“Do Now” for Thursday! Draw a balanced and an unbalanced force. Illustrate the net force in each drawing.
We know that the strength of a force is measured in SI units called Newtons…After Sir Isaac Newton. 1 Newton is equal to about 102 grams (0.22481 pounds).
Net Force is the sum or difference of the forces on an object. Net force = 300N Green Team Wins!
What is a NON-ZERO FORCE? Same as an unbalanced force! Non-zero = Unbalanced = Movement!
What is a ZERO FORCE? Same as a balanced force! Zero force = Balanced = NO Movement
Work is done when an object is moved in the direction in which a force is applied to it.
Is There Work Without Motion? NOPE! No Work Here!
Carrying your backpack to school might seem like work - but it’s not! ^ ^^FORCE DIRECTION The force must be in the direction the object moves!!!
FORMULA FOR WORK! Work = Force X Distance (Newtons) (Meters) (Joule) Work is calculated as the amount of force applied to an object times the distance the object moves. The term JOULE is used to describe a unit of work.
FYI – A 500N runner in the Empire State Building’s “Run-Up-Race” creates 160,000 joules of work while climbing the 1,576 steps. Enough work to lift an elephant over 3 meters!
FORMULA FOR POWER! Power = Work OR Power = Force X Distance Time Time Power is described in Joules/Second units called WATTS. One joule of work done in one second = one watt of power.
A watt is a very small unit! Power is often measured in larger units such as Kilowatts (Kw) or Horsepower (hp). 1 Kilowatt = 1,000 watts 1 Horsepower = 746 watts The average car has 110 – 150 hp. The average semi-truck has 200-400 hp A drag race car can have over 5,000 hp The average horse has 22.5 hp.