Describing Motion
Define Reference Point and give an example.
The starting point you choose to describe the location, or position, of an object. "We are in the room to the right of the front door."
What are two types of forces; and what are examples of them?
Contact; karate kick. Non contact; gravity.
____ is done on an object when the object moves in the direction of the applied force.
Work
mass / volume =
Density
Work; less.
The speed and the direction of a moving object is ______.
Velocity
If the net force on an object is 0, the motion of the object does not change.
Newton's 1st Law
What's the difference between efficiency and mechanical advantage?
Efficiency of a machine is the ratio of the output work to the input work. Mechanical advantage of a machine is the ratio of the output force produced to the input force applied.
Atmospheric pressure _____ with elevation above sea level and ____ with elevation below sea level.
decreases; increases.
The property that resists a change in the motion of an object.
Inertia
How do you calculate speed?
Average speed (m/s) = total distance (m) / total time (s)
______ forces cause an object to move.
Unbalanced.
What are the 6 simple machines?
Lever, Pulley, Wedge, Wheel and Axle, Inclined Plane, and Screw
What does Archimedes' Principle explain?
That the weight of the fluid that an object displaces is equal to the buoyant force acting on the object.
To describe a position in more than one dimension, you must use more than one ________.
reference direction.
What is the difference between distance and displacement?
Distance depends on the path taken. Displacement only depends on the initial and final position.
Gymnast pushing against the vault, the vault pushes back against the gymnast. "When one object exerts a force on a second object, the second object exerts a force on the first object.
There are three types of levers, what are they?
First class, second class, and third class.
Bernoulli's Principle
Newton's 2nd Law
Shows the relationship between speed and time and can be used to determine information about the acceleration of an object.
A speed-time graph.
In any collision, _____ is transferred from object to another.
momentum
What is an example of a compound machine?
Can opener.
What affects the drag force of an object?
Speed, size, and shape of an object, as well as the density of the fluid in which the object moves.
"____!" - Archimedes
EUREKA!