Mechanical Forces
What is the term for a push or a pull?
Force
Wheel & Axel, Gears
What is relative motion?
Motion depends on the frame of reference for the object being observed
The law of inertia is also known as...
What is the best food on the Thanksgiving table?
Sweet potatoes!
Change in position due to an applied force
How do we pay for mechanical advantage?
Distance! The distance principle
What causes an object to decelerate?
What does it mean for something to be "conserved"?
The amount will remain constant. This applied to matter, energy, and momentum
T/F: Power is defined by how much work can be done within a given amount of time
True
Which of the following is the equation for potential energy?
A. energy = 1/2(mv)2
B. energy = mgh
B. energy = mgh
Is the following a modified inclined plane or lever?
Gear
Gears are modified levers
What is terminal velocity?
The maximum speed of a falling object
(fun fact: Squirrels can survive falling from any height because they survive a fall at their terminal velocity)
What is the law of conservation of momentum?
Transfers of momentum in a closed system must be equal
Why does the distance principle help us?
Which object would have more momentum:
A. a 10kg ball traveling at 5m/s
B. a 10kg ball traveling at 10m/s
B. The 10kg ball traveling at 10m/s
Where is the fulcrum in a 3rd-class lever?
What might make two objects fall at different speeds?
Air resistance, different strengths of gravity
What is the law of gravity?
Who is the father of experimental science?
Galileo - leaning tower of Pisa