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47 Cards in this Set
- Front
- Back
Which formula is needed to find the force down this inclined plane? |
Force parallel to the plane or the Vertical component of force, which is (W sin degrees) |
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Which formula is need to find the force into the plane? |
Force perpendicular to the plane or Horizontal component of force, which is (W cos degrees) |
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Which formula is needed to find the normal force of the object on this plane? |
Horizontal component of force or (W cos degrees) |
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The arrow shows the weight of the object. If you divide the force down the plane by the force into the plane, you'll get.... |
which is the coefficient of friction. It's Ff / Fn. |
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If this object slides down the plane at constant velocity, then the tangent of the angle of incline is the.... |
or coefficient of sliding or kinetic friction |
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An object weighs 102 N. What formula will find its mass? |
W = m g |
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You find that an object fell a distance of 10 m. Which formula finds the time it took to fall? |
Use g = 9.8 m/s^2 for a |
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An object is hurled up and out in a curved trajectory. Which formula finds how long it was airborne? |
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Which formula lets you calculate horizontal component of velocity of a projectile? |
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Which formula lets you calculate vertical component of velocity of a projectile? |
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An object is moving horizontally at 5 m/s in a given time period. Which formula gives how far it went (or range)? |
or v = d / t |
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You want to find out how high a projectile went up into the air. Which formula do you use? |
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You have a velocity-time graph. Which operation will give you acceleration? |
Slope (y / x) of any of the segments gives m/s^2. |
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You have a velocity-time graph. Which operation gives you displacement for a particular time frame? |
Area (y times x) under the curve, which is actually the area between the line and the x-axis. Negative area would be negative displacement. |
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You have 2 opposing unbalance forces. Which formula will give you a net force? |
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With a net force, which formula will tell you how much the object can be accelerated, given the mass? |
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Suppose an opposing force is friction. You know how much force it takes to pull it at constant velocity. Which formula give you a unit-less number indicating "roughness"? |
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You have a projectile fired upward at 15 degrees, which formula will give you the horizontal velocity only? |
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A sled is being pulled with a force at an angle. What formula gives you the horizontal force that's pulling it? |
Given Force x cosine of the angle |
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This sled has a weight. What must be subtracted from that weight to get the normal force? |
Vertical component of the pulling force. That's Given force x sine of the angle. |
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You have determined how many times an object at the end of a string will rotate in 1 second. What formula lets you find how long it takes to rotate once? |
T = 1 / f [Period of Time is the converse of frequency.] |
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You are using Snell's law to determine the critical angle going from water to air. What angle should the "angle of refraction" be set at to do this? |
90 degrees |
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Which formula would you use to find the force of attraction between 2 objects based on just masses & distance between them? |
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Which formula would you use to find the electrical force of attraction between 2 charges separated by a distance? |
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Where do you find the Universal Gravitation Constant, Coulomb's Constant, speed of light, speed of sound, & indices of refraction? |
Reference page that is provided to you |
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Which formula has a constant that tells you how far a spring will be extended with each unit of force attached to it? |
F = -k d |
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Which formula will tell you how much energy a spring will have if it is squished or stretched a certain length? |
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Which formula will give you the velocity of light in a transparent substance, if you know the substance's index of refraction? |
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Light moves from medium #1 to #2. One index of refraction & angles with the normal are known. What formula is involved? |
Snell's Law |
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A rollercoaster car is stopped at the top of a hill. To determine how much energy of position it has, which formula would you use? |
PEgravitational = m g h (which is same as W h) |
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What formula tells you how much energy a car coasting at 30 m/s has? |
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A object starts moving from a standstill and gets up to a final velocity after traveling a distance. What formula will give you its acceleration? |
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A object starts moving from a standstill and gets up to a final velocity after traveling for a time. What formula will give you its displacement during that time? |
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If you know two velocities for an object, how can you get an average velocity? |
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If you know total distance traveled and total time traveled, which formula give you average velocity? |
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You are horizontally spinning a mass from the end of a string of a certain radius above your head. Which formula allows you to find the force your hand is pulling inward on the mass? |
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You are horizontally spinning a mass from the end of a string of a certain radius above your head. Which formula allows you to find the inwardly-directed acceleration provided by your hand? |
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What formula do you use to find the force exerted on an object if you know a change in velocity, the mass, and the time of interaction? |
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If you wanted to calculate the momentum of an object, you would use which formula? |
p = m v |
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If you wanted to find the change in momentum, aka impulse, which formula would you use |
Don't confuse this J with joules, an energy unit. NC uses J to represent impulse on its reference pages. |
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What formula would you use to determine the velocity of two objects that collide & stick together, AFTER collision? You need to know masses & starting velocities. |
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If you have a starting velocity of +13 m/s (which is east) and an ending velocity of -20 m/s (which is west), what is the change in velocity? |
Vf - Vi = -33 m/s |
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How would you set up a certain formula to determine the effective resistance if you have 2 ohm, 3 ohm, & 4 ohm resistors wired together in parallel? |
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How would you set up a certain formula to determine the effective resistance if you have 2 ohm, 3 ohm, & 4 ohm resistors wired together in series? |
Req = 2 + 3 + 4 |
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If you knew the voltage & resistance in an electrical circuit, what formula would you use to determine the current? |
I = V / R [Also listed as V = I R or R = V / I] |
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If you knew how many watts a hair dryer used and the voltage of the source, then you could determine the current using which formula? |
P = V I |
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If you wanted to determine the electricity loss or waste in an electric circuit, you would use which power formula? |
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