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# Crawford SS Quiz #5

Using your formula chart, what formula can you use if the problem gives you the volume and density and the mass is the unknown? D = m/v
Using your formula chart, what formula can you use if the starting speed is 1 m/s and the ending speed is 5 m/s and you need to calculate the acceleration? A = vf - vi/ time
Using your formula chart, what formula can you use if the question gives you the mass and acceleration and the force is the unknown? F = m/a
What is the formula for speed? s = d/t
Using the constants and conversions section of your formula chart, what does (A) mean? ampere
What is the formula for Current? current = voltage/ resistance
Where on your formula chart can you find what a Hertz is equal to? Constants and conversions...1 wave cycle/second
Using the constants and conversions section of your formula chart, what UNITS correspond to the formula, Work - force x distance? Joule (J)= N x m
What is the formula for POWER? Power = work/time
What is the formula for electrical power? Electrical power = voltage x current
what does "vf" mean? final velocity
What is the Law of Conservation of Mass? Law states that the mass of the reactants (before a chemical reaction) will equal the products (after a chemical reaction)
What is the Law of Conservation of Momentum? Monetum means that an object has a mass and a velocity. Conservation of Momentum means that objects in a collision will have the same TOTAL momentum before they collide and the same TOTAL momentum after they collide, even if the velocities change.
What is the Law of Universal Gravitation? This is a Law that is mainly used to help determine the attraction between 2 planets...based on how close or far apart they are.
What is the Law of Inertia? Remember the card and the coin...object at rest stays at rest unless an outside force directly acts on the object
What is displacement? Displacement can be used to find the volume of an irregularly shaped object...you read the intial and final volume then subtract
Acceleration is a __________ in velocity change
Velocity is defined as an objects speed and __________ direction
If you are taking a turn at 20 mph, is your speed or velocity constant? WHY? speed is constant...direction is changing which means your velocity is NOT constant
If the problem gives you the force, distance and time, how do you solve for power? power is work/time...work isn't given so you substitute in force X distance. New formula is: Power = force x distance/time
How many formulas on your formula chart use the word mass? 6
Anything falling affected by Earth's gravity will accelerate at a rate of ______ 9.8 m/s2
Using your constants and conversions section, what are the UNITS that go with the formula: F = m x a N = kg x m/s2
Created by: jwcrawford3