Friction Flashcards
(21 cards)
An astronaut in an orbiting spacecraft floats bc the spacecraft and the astronaut fall at the same rate
People in orbit
The pull of gravity based on the_____of two objects and the_____between them?
Mass and distance
The elliptical path one body such as the moon
Orbit
Two sources in contact
Friction
Substances that can flow easily
Fluid
The minimum speed to send an object into orbit is approximately 8000 meters per second
Space craft orbit
Examples of fluid
Liquid and gas
When an object pushes through a fluid, it pushes the molecules
Out of the way
Water pressure increased with great water depth?
Changing pressure in water
A force that is carried by air and moves the opposite direction
Air resistance
Ways to increase air resistance
Increasing speed and surface area
Ways to decrease air resistance
Decrease speed and surface area
Pressure in a fluid depends on?
Depth
Air pressure decreases at higher elevations bc there is less air above you
Changing pressure air
The upper force on objects in a fluid
Buoyancy force
Says that increased speed of the motion of a fluid decreases the pressure within the fluid and the faster a fluid moves the less pressure it exerts on surfaces or openings
Examples: prairie dog
Bernoulli’s Principle
Says that when an outside pressure is applied at any point to a fluid in a container that presser is transmitted throughout the fluid with equal strength
Example: toothpaste
Pascal’s Principle
Uses liquid to transmit or increase a force
Hydraulic Machines
Resistance of a object to decrease to change a speed
Inertia
The force that objects exert on each other?
Gravity
Two objects with different______will have the same______acceleration in vacuum?
Masses
