Download Chapter 6 Motion

Chapter 6 Motion
Name____________________________________
Motion
•
When an object ________________________ in relation to a reference point
Reference point
• The object that appears to _______________
• _________ is commonly used as reference, buildings, trees
• Reference point can also be _________ (Earth)
• ____________ depends on Reference Point
Distance
• Total length of the ____________ between two points
Displacement
• Length and direction between a ____________ from starting to ending point
• Displacement is a _________
• Has ____________(size) and direction
• Use arrows. Longer arrow, larger magnitude
for displacement
Rate at which an object moves is ________
• Distance/ time
• ________
• Average speed
______________________
Velocity
•
•
•
•
Speed in a certain __________(always includes a reference direction)
Rate of change of position
Is constant only if________________ do not change
Velocity can be ______________to get resultant velocity
Acceleration
• Rate at which ___________ changes (speed up, slow down, change direction)
• Tells you _________velocity changes
• Final velocity- initial velocity
time it takes to change velocity
•
________________ is acceleration due to change of direction
Centripetal acceleration
Acceleration due to gravity
•
All objects accelerate towards Earth at a rate of ____________
• ______________ slows down acceleration
• _______________ also known as air resistance
•
•
•
•
Depends on _________________ of object
Acceleration stops at ____________ velocity
As objects fall, air resistance increases until _____________ = ____________________
Object continues to fall, but at a ___________ velocity
A GREATER FORCE MUST BE APPLIED TO A GREATER MASS TO PRODUCE THE
____________ACCELERATION
• F=M*A
• A=F/M
•
•
Free fall means that object is falling with __________ (such as air resistance)
acting on it except gravity
Astronauts appear to _______________ due to “freefall” in orbiting spacecraft
Work
•
•
•
Is done when an object is caused to ________ a certain distance
The ability to do work is called ___________
SI unit for both work and energy is called the __________
Energy
•
The main forms are
•
Mechanical energy can be either ________________
Kinetic Energy
•
The energy an object has due to motion is called _________ energy
•
•
•
•
“kinetos” means __________(Greek)
Kinetic energy depends on ___________
Speed, kinetic energy
Formula for kinetic energy:
Potential Energy
• Potential energy is stored, resulting from ____________________ and has “potential” to do work
• Potential energy related to ___________ is “gravitational potential energy”
• Depends on weight and height relative to reference point
• Potential energy = weight x height
o
Potential energy of objects that can be _____________ is called “elastic potential energy”
•
Mechanical Energy = Potential Energy + Kinetic Energy
•
•
One common _______________ of energy is between potential and kinetic energy
Any object that ____________ experiences a change in kinetic and gravitational potential energy
Law of conservation of energy:
• Energy cannot be created or destroyed, only ______________ from one type to another