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






2. Total kinetic energy before = total kinetic energy after.






3. Fo = fs (V






4. 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.






5. PEGrav = P = mxgxh KELinear = K =






6. ?t = ?to / Beta






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






8. Q = mc ? T (MCAT !) and Q = mL






9. If the object is sliding - then you are dealing with ___________ and it will be constant and equal to






10. Ainxvin = Aoutxvout A= Area v = velocity






11. 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






12. The speed at an instant (infinitesimal time interval).






13. b






14. FB = ?xVxg = mDisplaced fluidxg = weightDisplaced fluid ? = density of the fluid V = volume of fluid displaced






15. If the object is not moving - you are dealing with ___________ and it can have any value from zero up to






16. 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






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






18. 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).






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






20. Gravity is divided into two components on an inclined plane. One component is normal (perpendicular) to the plane surface: FN = mg






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






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






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






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






25. FF =






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






27. The hypotenuse of a right - angled triangle with the radius as the other two sides. Using Pythagoras - the displacement is square root of 2r^2. The distance is the arc of 1/4 circumference.






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






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






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






31. Quantity described by magnitude but not direction (time - area - volume)






32. 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


33. 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:






34. Mass/volume p= m/V






35. 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






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






37. 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.






38. 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






39. 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.






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






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






43. 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.






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






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


46. Every action has an equal and opposite reaction


47. T=mv^2/L






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


49. Force equals mass times acceleration. Fnet = SFExt = mxa


50. 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.