Notes: Name: __________________________

Directions: Fill in the blanks and boxes in the note panel. After notes are done, part of your homework is to fill in the sides with study questions and write a summary that demonstrates you understand what is important in the notes.1st Law: Rotational StyleQuestions/Main Ideas Main Notes

Newton’s First Law:

• An object wants to _________________________________________

• In order to change, it needs a _________________ not equal to zero

if ______ then, a=0

Translational Motion: motion without ____________________

• ______________ can cause rotation

• If a force is applied to an object with a fulcrum, you get rotational motion

• Fulcrum: ____________________

• Rotational Force is most effective _______________ the fulcrum

• Torque is the combination of _______________ and

distance ______________________

Which lever arm has the greatest torque?

A B C

• Only the _________________ part of the force is applied to the torque

• This require a touch of trigonometry

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NOTES NEWTON’S LAWS –TORQUE

A B

C D

E F

Summary:

=

F1 F2

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Rotational Stability

• “In the absence of a ______________, an object not rotating will continue to

______________ and an object rotating will continue to ______________ at a

constant _______________________”

• This means that if a rotational system is in _________________

(____________________), the net torque is ____________

• CW torques are _____________, CCW torques are _______________

Which dog has a positive torque?

Center Of Mass Concentration of mass

• Where the ___________________ of the object is located

• Where is the furniture’s COM?

• Objects are ____________ when the COM is at the fulcrum

• WHY?

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• Weight force of the COM can add a __________ if it is not at the fulcrum

What is applying the torque to the left side?

• Objects in ____________ will rotate around their center of mass

Example:A 175 lb. father wants to let his 55 lb. daughter play on a seesaw as he buys some much needed coffee. Assume she sits at the end of the 10.0-foot long board. If the board has a weight of 100 lbs. where must he slide the board so that the board’s weight will balance her weight?

Summary:

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