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MCAT Physics

Subjects : mcat, science
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. P = ?xgxh h = depth of water ? = density of water






2. V = IxR V = voltage applied I = current R = resistance


3. F=(p*q)/(p+q) - 1/f=1/p+1/q - f=focal length p=object distance q=image distance






4. 'rotational equivalent of force'; a force applied so as to cause an angular acceleration. t = FxLxsin ?






5. Moving around a circle at constant speed - frequency = How many times the object goes around the circle in one second. Period = time it takes to move around the entire circle.






6. A force that causes rotation. t = FxLxsin ? Where ? is the angle between F and L; unit: Nm






7. T = torque = Ixa I = moment of inertia = mxr


8. Back and forth oscillatory motion corresponding to sound. x = Axcos(?xt) = Axcos(2xpxf xt) ? = angular frequency f = frequency






9. L1 = F1






10. When something is in __________ - the vector sum of all forces acting on it = 0. When something is in ____________ - it is either at rest or moving at constant velocity. When something is in ___________ - there is no overall acceleration.






11. Conservation of momentum only - ?Kinetic energy is lost during an inelastic collision - Collisions in everyday life are inelastic to varying extents - When things stick together after a collision






12. You weigh more on an elevator accelerating up because F=mg + ma - where a is the ______________ of the elevator.






13. Sliding down a frictionless inclined plane involves the __________ as doing a free fall at the same height.






14. Loop Rule: SAround any loop ?Vi = 0 Node Rule: Sat any node Ii = 0


15. Q = mxcx?T (no phase changes!) Q = the heat added c = specific heat. ?T = temperature change - K






16. F=mv^2/R=m?r






17. Use the vertical component only- calculate the time it takes for the projectile to hit the ground.






18. The coefficient of friction is intrinsic to the ________ of the surface and the object - and is determined empirically.






19. For light: Ep = hxf = hxc / ? = pxc Therefore - momentum: p = h / ? Similarly for particles - p = mxv = h / ? - so the matter wave's wavelength must be ? = h / m v






20. Total momentum before = total momentum after.






21. R = ?xL / Ax ? = resistivity of wire material L = length of the wire Ax = cross - sectional area of the wire






22. Each resistor has the same current; differenct voltage drop. Total resistance = R1+R2+R3+. . .


23. Horizontal: x-x?= v?xt + 0 Vertical: y-y? = v?xt +






24. The value of speed/velocity - distance/displacement are interchangeable in this case - just keep a mental note of the direction. Ave acceleration = change in velocity / time






25. Momentum is a vector - so be sure to assign _________________ when adding individual momenta in calculating the total momentum.






26. This is what we 'weightlessness' really means when we see astronauts orbiting in space. The astronauts are falling toward the earth due to gravitational forces (weight) - but they are falling at the same rate as their shuttle - so it appears that the






27. When the centripetal force is taken away (Such as when the string snaps) - the object will...






28. C = ?xeoxA / d ? = dielectric constant A = area of plates d = distance between plates eo = 8.85 E(-12) F/m






29. DF = dq v(B sin a) = I dl(B sin a)


30. The resistance encountered when one body is moved in contact with another. FF =






31. A measure of both the speed and direction of a moving object. V=?x/?t






32. T = FxLxsin ? Where ? is the angle between F and L; unit: Nm






33. The ____________ of g toward the Earth holds true at all times - even when the projectile is traveling up (it's decelerating on its way up - which is the same thing as accelerating down).






34. The angular equivalent of a force - it makes things rotate - have angular acceleration - change angular velocity and direction.






35. ?P = 8x?xLxQ/(pxr4) ? = coefficient of viscosity L = length of pipe r = radius of pipe Q = flow rate of fluid


36. P =






37. (physics) a rate of change of velocity






38. The velocity is always less or equal to the speed. The displacement is always less or equal to the distance. Displacement and velocity are vectors. Distance and speed are not.






39. Accelerate toward the ground at a constant velocity.






40. A force that is always in the direction to impede motion xLike any other force - friction is a vector. However - its direction is easy because it's always opposite to motion.






41. For a given mass - its weight on Earth is different from its weight on the _____.






42. Si = 0 at a junction and S?V = 0 in a loop


43. P =






44. M = - Di / Do = - i / o = Hi / Ho - Dimensionless value denoted by m given by the equation: m = - i/o - where i is image height and o is object height. A negative m denotes an inverted image - whereas a positive m denotes an upright image.






45. I = Q/t and R = ?l/A






46. In an object that begins to slip on the inclined plane: parallel component of gravity...






47. Roughly 10 orders of magnitude weaker than the strong force. Responsible for radioactive decay.






48. Even though they are accelerating toward the Earth - they never crash into the Earth's surface because the Earth is _____ (the surface curves away from the satellite at the same rate as the satellite falls).






49. B=






50. RESISTANCE=VOLTAGE/CURRENT. V = IxR