Circular Motion
When does an object revolve?
It revolves when it moves around an external axis.
What is centripetal force?
It is any force that causes an object to move in a circle.
What is a projectile?
What is an atom?
It is the smallest particle of an element that retains its chemical identity.
Which phase of matter holds it shape and doesn't flow?
The solid phase.
How much does a wheel move in one rotation?
The wheel moves one circumference.
Where is centripetal force directed?
It is directed toward the center of the circle in which an object moves.
What is velocity?
Velocity is speed with direction.
What is a compound?
It is a substance that contains two or more different elemens chemically joined.
What does the common thermometer use as a gauge?
It uses colored liquid alcohol.
What is angular speed?
It is the amount an object in circular motion spins per unit of time.
What is centrifugal force?
It is an effect of inertia that you feel when your body is forced to move in a circle.
What is a displacement vector?
An object that shows a change in position.
What is a molecule?
It is a group of two or more atoms joined together by chemical bonds.
What does temperature measure?
It measures the kinetic energy of individual atoms.
How do you calculate anngular speed?
Angular speed=rotations or degrees/time
What keeps Earth in orbit?
The force of gravity between Earth and the sun.
What is the trayectory of a projectile in an arch-shaped curve called?
It is called a parabola.
What is an element?
A pure substance tha cannot be broken down into simpler substanes.
On the fahrenit scale, when does water freeze and when does it boil?
It freezes at 32 degrees and it boils when it reaches 212 degrees.
What is the formula of linear speed?
v= 2πr/t
What is the formula of universal gravitation?
Fg= G m1m2/r2
What is the formula for the vertical velocity of a projectile?
vy= g(acceleration due to gravity) * t(time)
What is a mixture?
Something that contains more than one kind of atom, molecule, or compund.
When does absolute zero occur?
At -273°C or -459°F