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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. Accelerate toward the ground at a constant velocity.






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






3. b






4. The vector sum of the momenta of all the shrapnel from the explosion.






5. The significance of Newton's first law on equilibrium is: things in equilibrium will remain in equilibrium unless acted on by an external force. Things resist change in momentum because of inertia (try stopping a truck. It's not easy because it resis

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6. If the force and the distance applied is in the same direction...






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






8. 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.






9. ?S = Q / T (Phase changes only: melting - boiling - freezing - etc)






10. 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.






11. Logarithmic unit of measurement that expresses the magnitude of a physical quantity (usually power or intensity) relative to a specified or implied reference level. B (Decibel level of sound) = 10 log ( I / Io ) I = intensity of sound Io = intensity






12. Uniformly accelerated motion along a straight line






13. E = moxc2






14. Fx?t = ?(mxv)






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






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






17. The principle whereby every energy transfer or transformation increases the entropy of the universe. Ordered forms of energy are at least partly converted to heat - and in spontaneous reactions - the free energy of the system also decreases. ?U = QAd






18. It makes things accelerate - change velocity or change direction. In the MCAT - it is indicated by an arrow. The direction of the arrow is the direction of the force. The magnitude of the force is often labeled beside the arrow. F=ma - so the unit f






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






20. Distance travelled per unit time






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






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






23. A hypothetical pendulum suspended by a weightless frictionless thread of constant length. f = 1/ T and T=2p(sqrt L/g)






24. Instantaneous speed equals instantaneous velocity ____________.






25. The increase in volume of a substance due to an increase in temperature. Linear: ?L = Loxax?T Volume: ?V = VoxBetax?T






26. Motion of a particle fom point A to point B. x = x 0 + v 0 t + 1/2at2 and V






27. Friction always does ___________ because frictional forces always act against the direction of motion.






28. SFx = 0 and SFy = 0






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






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






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

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32. W = F d cos? and P = ?W/?t






33. P =






34. 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






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. 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






37. In an object going down the inclined plane at constant velocity: parallel component of gravity...






38. Y or S or B = stress / strain stress = F/A






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






40. PxV = nxRxT n = # of moles of gas R = gas law constant = 8.31 J / K mole. - law that states the math relationship of pressure (P) - volume (V) - temperature (T) - the gas constant (R) - and the number of moles of a gas (n); PV=nRT.






41. ?Q / ?t = kxAx?T / L k = thermal conductivity A = area of solid L = thickness of solid






42. Total momentum of 2 objects after a collision






43. Operation involving a ___________ always results in a vector.






44. Periodic frequency resulting from the superposition of two waves that have slightly different frequencies. f(beat) = |f1- f2|






45. L1 = F1






46. Fo = fs (V






47. V2 = rxgxtan ?






48. P = I






49. Vibration about an equilibrium position in which a restoring force is proportional to the displacement from equilibrium. T=2p(sqrt(m)/(k)) where k = spring constant = 1 / T = 1 / period






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