Chapter 11
What is the difference between distance and displacement?
Distance: The length between two points.
Displacement: The length between point "A" and point "B". (Like a "shortcut.")
A force is a push or a pull. How is a force measured?
Newtons
Work and energy are both measured in___.
Joules
Potential: Stored Energy
Kinetic: Energy of motion
Kinetic energy and potential energy are measured in___________.
Joules
What is the difference between speed and velocity?
Speed: Scalar (Direction)
Velocity: Vector (Direction and Magnitude)
List the four types of friction.
Rolling, static, fluid, sliding
Machines make work easier to do. Machines change the ______ of a force needed, the direction of a force, or the distance over which a force acts.
Hydroelectric Energy
Geothermal Energy
Biomass Energy
Wind Energy
When I rub my hands together, I am producing _____________ friction.
Sliding
What is the difference between instantaneous acceleration and constant acceleration?
Instantaneous Acceleration: Acceleration at any given instance.
Constant Acceleration: Acceleration that increases over a short period of time.
A ball is thrown and has projectile motion. Use your hands to show me the shape of the path that the ball takes.
Arch
Work Input: Work I do on the machine
Work Output: Work the machine does
KE= 1/2 _________ x v2
PE= mg__________
Mass
Height
What is the difference between renewable and nonrenewable energy resources?
Renewable: Can be reproduced in a short amount of time; Sun, wind, water, trees.
Nonrenewable: Can NOT be reproduced in a short amount of time; Coal, oil, natural gas, etc.
________________is the system of objects that are not moving with respect to one another.
A. Frame of Reference
B. Motion
C. Acceleration
A. Frame of Reference
State each of Newton's three laws of motion.
1. An object in motion will stay in motion unless something acts on it.
2. Force = mass x acceleration
3. For every action, there is an equal and opposite reaction.
Pulley Inclined Plane
Wheel and Axel
Lever
Wedge
Screw
We discussed that KE and PE were inversely proportional. (Think about the online rollercoaster activity you completed). What does inversely proportional mean?
As one goes up, the other one goes down.
So as KE goes up, PE goes down, and vice versa.
What type of energy keeps you warm?
Thermal energy
Speed = Distance/ ?
Time
What is the difference between weight and mass?
Weight: Mass x acceleration due to gravity
(how heavy an object is)
Mass: How much space an object takes up
(A measure of the inertia an object has)
A compound machines is made up of ________________________.
Two or more simple machines, working together.
Name THREE type of energy we discussed and give an example of each.
Mechanical
Thermal
Nuclear
Mechanical
Chemical (light, sound, etc.)
What is Mrs. Ames motto?
"make today great"