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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. F=g(m1m2/r^2) G = 6.67 E-11 N m






2. At ___________ - weight = friction - so the net force is 0. Thus - the acceleration is 0. So - the speed stays constant at terminal velocity






3. X = Axcos(?xt) = Axcos(2xpxf xt) ? = angular frequency f = frequency






4. When something is laying still on a horizontal surface - the normal force is ___________ to the weight.






5. The direction of instantaneous velocity is _______ to the path at that point Ave speed = distance / time = v = d/t






6. L = L0 (1 + a? T )






7. Instantaneous velocity has ________ - instantaneous speed does not.






8. Uniformly accelerated motion along a straight line






9. Mass per unit of volume.?=m/V(unit : kg /m3 )






10. Applies to objects in motion. A key sliding across the table eventually comes to a stop because of kinetic friction.






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






12. P = I






13. Instantaneous speed equals instantaneous velocity ____________.






14. Voltage created by the combination of movement and a magnetic field. Emf=N(?F/?t)






15. When there is no net gravitational force acting on you. Either you are so far out in space that there's no objects around you for light -years away - or you are between two objects with equal gravitational forces that cancel each other out.






16. The change in internal energy of a system is ?U = QAdded + WDone On - Qlost - WDone By






17. PEGrav = P = mxgxh KELinear = K =






18. 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






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






20. Centripetal force is due to centripetal acceleration. Centripetal acceleration is due to changes in velocity when going around a circle. The change in velocity is due to a constant change in direction. ?Sometimes a negative sign is used for centripet






21. When things are at translational equilibrium - the vector sum of all forces = 0. Things at ______________ either don't move - or is moving at a constant velocity. If an object is accelerating - it's not in equilibrium.






22. The distance of stretch or squeeze of an elastic material is directly proportional to the applied force F = kxx Potential Energy of a spring W =

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23. Mass / volume (unit : kg /m3 ) ? = m/v






24. Kinetic energy is __________ - so there are no positive / negative signs to worry about.






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






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

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27. Vector - has direction - rate of change in displacement.






28. N1xsin ?1 = n2xsin ?2

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29. Distance travelled per unit time






30. a = v^2/r f= mv^2/r cir = 2TT*r xnote that theta is always in radians. To convert degrees to radians - use this formula:






31. T=mv^2/L






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






33. V = f x? f = 1 / T T = period of wave






34. (physics) a rate of change of velocity






35. 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).






36. If the force is acting in one direction - but the object moves in a perpendicular direction - then...






37. A = Aoxe - k t = (1/2n)xA0 (after n half - lives) Where k = (ln 2) / half - life






38. Gravity decreases with the square of the distance. If the distance increases two fold - gravity decreases by a factor of four.






39. Xcm = S(mx) / Mtotal






40. 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).






41. VL = Vcellxe - t / (L / R) I = (Vcell/R)x[ 1 - e - t / (L / R) ] L / R = t = time constant






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






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






44. When a source emitting a sound and a detector receiving the sound move relative to each other - the virtual frequency vf' detected is less than (distance increases) or greater (distance decreases) than the actual emitted frequency. f' = f(V






45. FF =






46. Beta=sqrt 1- v^2/c^2






47. ?. equal to v(k/m) or - 2(pi)(f)






48. The acceleration produced by a net force on a body is directly proportional to the magntude of the net force - is in the same direction as the net force - and is inversely proportional to the mass of the body. Fnet = SFExt = mxa

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49. b






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