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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. The velocity at an instant (infinitesimal time interval).






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






3. +Net Heat added to the system +Net Work done on the system






4. Unless the object levitates or crashes through the inclined plane - the normal force always equals...






5. Acceleration in the opposite direction.






6. Ainxvin = Aoutxvout A= Area v = velocity






7. A v = const. and ?Av = const.






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






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






10. The average distance - weighted by mass - in a Cartesian coordinate - it is the point obtained by doing a weighted average for all the positions by their respective masses.






11. 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






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


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






14. When things are at rotational equilibrium - there the sum of all torques = 0.






15. E = hxf = mxc2 h = Planck's constant = 6.63 E(-34) J sec f = frequency of the photon






16. Satellites orbiting the Earth are in free fall. Their centripetal acceleration equals the acceleration from the Earth's gravity.






17. W = Px?V






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






19. 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






20. _____________ of all components of a vector equal to the vector itself.






21. There is no acceleration in the ________. The horizontal component of velocity is constant.






22. B=






23. P = I






24. 1/C? = 1/C1 + 1/C2 + 1/C3 + etc. **Voltages sum when capacitors are in series (V? = V1 + V2 + V3 ...)**






25. The speed.






26. xW = Fdcos? - F is force - d is the distance over which the force is applied - and ? is the angle between the force and distance. xDerived units - sign conventions - It is energy - and the unit is the Joule - Joule = N






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






28. 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






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






30. L1 = F1






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






32. mv - where m is mass - v is velocity and the symbol for momentum is p. xImpulse = Ft - where F is force and t is the time interval that the force acts.






33. Pulleys reduce the force you need to lift an object. The catch - it increases the required pulling distance. xComplex pulleys will have additional ropes that contribute to the pulling of the load (most likely not tested on the MCAT).






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






35. ?t = ?to / Beta






36. Friction acts ________ to the plane surface and opposite to the direction of motion. In a non - moving object on an inclined plane: normal component of gravity = normal force; parallel component of gravity = static friction.






37. C? = C1 + C2 + C3 + etc. **When capacitors are in parallel - the voltage drop is equal across the entire combination - i.e. V? = V1 = V2 = V3 = ...**






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






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






40. A net force acting on an object will cause that object to accelerate in the direction of the net force. The unit for force is the Newton. Both force and acceleration are vectors because they have a direction.


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






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






43. FF =






44. 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






45. 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






46. If the force and the distance applied is in opposite directions...






47. Interference in which individual displacements on opposite sides of the equilibrium position are added together to form the resultant wave. Must 180 degrees out of phase






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






49. xYou can only directly add vectors if they are in the same direction - To add vectors in different directions - you must add their x - y and z components. The resulting components make up the added vector.






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