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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. About one order of magnitude weaker than the strong force - but it can act at observable distances. Binds atoms together. Allows magnets to stick to your refrigerators. It is responsible for the fact that you are not falling through your chair right






3. Conservation of both momentum and kinetic energy - e.g. if you drop a ball and the ball bounces back to its original height






4. ? + ?gh + 1/2 ?v2 = constant


5. 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






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






7. Are free falling bodies.






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






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






10. The weakness of gravity is reflected in the ____________ - G - which is orders of magnitude smaller than the Coulomb's constant.






11. Whenever something is in the air - it's in a ___ - even when it is being tossed upwards - downwards or at an angle.






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






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






14. F = - kx and W = kx2 /2






15. 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






16. 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






17. 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.






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






19. The point of maximum displacement in a standing wave.






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






21. 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.


22. 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.






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






24. Roughly 50 orders of magnitude weaker than the strong force. Responsible for weight (not mass!). Also - responsible for planet orbits.






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


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






27. 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


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






29. Every action has an equal and opposite reaction


30. ET = Ek + Ep and E = mc2






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






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






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






34. Unlike friction - gravity always acts downwards. Thus - it does not matter what detour you take because sideward motion perpendicular to the gravitational force involves no work.






35. Acceleration in the opposite direction.






36. RESISTANCE=VOLTAGE/CURRENT. V = IxR


37. 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.






38. Mass/volume p= m/V






39. xSpeed: scalar - no direction - rate of change in distance.






40. V2 = rxgxtan ?






41. P = I






42. On Earth - the rate of acceleration is g - which is ______.






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






44. When you toss something straight up and it comes down to where it started - the displacement - s - for the entire trip is _. Initial velocity and acceleration are opposite in sign.






45. The force that acts on a mass - It has a magnitude and a direction. It is a vector. Because it is a force - F=ma holds true.






46. When something is laying still on an inclined plane - the normal force and friction force adds up in a _________ to equal the weight.






47. 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.






48. 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.






49. 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






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