Motion
What is acceleration?
The rate of how velocity changes.
What is Sir Issac Newton's second law?
Force = Mass ⋅ Acceleration
How do we find the potential energy of a spring?
PEs = ½ ⋅ k ⋅ Δx2
What is Kepler's 3rd law?
T2 = a⋅R3
What is gravity equal to?
10 or 9.8 m/s.
What is the equation to find the change in distance?
Δx = ½·a·t2 + vi·t
What is intertia?
When an object is at rest stays in rest, until a force acts upon it.
What is the equation to find the change in energy?
Work = ΔE
What is an exoplanet?
A planet outside the solar system.
What is the equation for Gravitational Potential energy?
GPE = m*g*h
What is the term for the distance that an object moves?
Displacement
What is it called when objects are moving at a constant speed?
Equilibrium.
Conservation laws says...
Energy cannot be destroy or created.
What is the correct unit to find rotational speed?
Rotations per minute.
What is energy equal to?
What is freefall?
When something is only acted on gravity
What is the force that acts between two objects?
Friction Force.
What is Mechanical energy balance is the product of equation of motion and?
Velocity.
What is the motion that repeats itself over time?
Circular motion.
What is net force?
A sum of all the forces acting on an object.
Guy1 is 60m away from Guy2. Guy1 is an average runner of 9 m/s. How long would it take for Guy1 to reach Guy2?
6.7 seconds.
What is the net force? When in a tug of war, when one team is pulling with a force of 100 N and the other 80 N.
20N.
What is the result? If a red ball with a mass of 10 kg is traveling at a speed of 5 m/s and collides with a blue ball with a mass of 20 kg traveling at a speed of 10 m/s.
Red ball = 10 kg * 5 m/s = 50 kg m/s
Blue ball = 20 kg * 10 m/s = 200 kg m/s
Both balls = 150 kg m/s west
What is the equation to find Centripetal Acceleration?
ac = v2 / R
What is power?
A unit for the rate energy is being used.
P = W / T