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define "mechanics"
define "energy"
What are some ways that objects move?
What force greatly affects motion on earth?
List 3 ways mechanical energy is being moved around you.
What is potential energy?
What is kinetic energy?
Give examples of something with potential energy
Describe the transfer of energy between kinetic and potential energy that occurs during a roller coaster ride
Explain how a wind-up clock uses potential and mechanical energy
The law of conservation of energy states that energy cannot be _____________ or _____________. It can only change form.
The first law of thermodynamics states that in a closed system, energy can not be created or destroyed, only _______________ or _________________
The law of conservation of mass states that _______ cannot be created or destroyed, it can only change forms.
Who was the first scientist to show that heat is a form of energy that can be converted from mechanical energy. He used a brass paddle wheel stirring water in a copper vessel.
Because velocity is speed in a particular direction, __________________ is movement in a particular direction.
What two quantities affect an object's momentum
The law of conservation of momentum states that the momentum of a system after a collision must be the same as the momentum ________________ the collision.
Mechanical force is _________ or ___________ on an object
What is tension?
What is tensile strength? The amount of _______________ that an object can withstand.
What is bouyancy?
Name the Law:
Energy can not be created or destroyed, it can only change forms
Name the Law:
In a closed system, energy can neither be created nor destroyed only transformed or transferred
Name the law
Changes of momentum in a closed system must be equal
Name the law:
Matter cannot be created or destroyed, it can only change forms
Name the force that resists movement
Name the force that is exerted by liquids and gases equal to the mass of displaced fluid
What is tension?
What is a force
A change in position due to an applied force
is lifting a weight above your head considered work
Is holding a weight above your head work
What is power
a car has more ________ than my legs because it can do ___________ work in ____________ time
