Circuits
Newtons law of universal gravitation
Gm1m2/r2
The term for something that only has a magnitude
What is a scalar?
This means how far something has traveled and it is a scalar
What is distance?
The unit of mass in physics
What is the kilogram?
You walk 20 meters West and then 10 meters East. What is the total distance.
What is 30 m?
The power dissipated in a light bulb is 50 W at standard operating voltage of 120V. If two of these lightbulbs are connected in parallel, and connected to a 100 V power supply, what is the total power dissipated? (You may assume the resistance of the lightbulb is unchanged.)
What is 69 W?
The term for something in physics that has magnitude and direction
What is a vector?
This term is the change in position of an object
What is displacement?
The units for velocity in physics
What is m/s?
You walk 20 meters West and then 15 meters South. What is your displacement? (magnitude and direction)
What is 25 meters, 37 degrees South of West?
A battery is in series with a 5 ohm resistor. The voltage across the resistor is 2.0 V, and the internal resistance of the battery is 1 ohm. What is the emf of the battery?
What is 2.4 V?
Name two things in physics that are scalars
What is ........? (answers vary)
The term in physics can be thought of as "speed with a direction"
What is velocity?
What are the units for work?
Joules
An object is dropped from rest. How fast is it going in 4 seconds?
What is 40 m/s?
Centripetal Acceleration
v2/r
Name three things in physics that are vectors
Answers vary
This term is the rate at which the velocity is changing
What is acceleration?
Forces is measured in Newtons. What are the SI Units for a Newton?
Kgm/s2
A 10 kg objects is accelerating at 2.5 m/s2, what force is being applied to the object? (with units)
25 Newtons
mechanical energy in terms of v, h, g, and m
Em = Ek + Ep = mgh +1/2mv2
This is a term that is used to describe the tendency for an object to stay at rest or stay in motion at constant velocity
What is inertia?
This term refers to a condition where something is falling at an acceleration that is equal to the acceleration from gravity
What is free fall?
23kW-hr in ev
What is
An object is sliding down a 30 degree hill. What is the objects acceleration down the hill? (with units)
4.9 m/s2