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Test your basic knowledge |
MCAT Physics
Start Test
Study First
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. T = FxLxsin ? Where ? is the angle between F and L; unit: Nm
Torque
Orbiting in space
Heating a Solid - Liquid or Gas
Newton's Second Law
2. 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 = ...**
Capacitors in parallel
9.8 m/s2
Speed of a Wave on a String
acceleration
3. FF =
equal and opposite
Doppler Effect: when d is decreasing use + vo and - vs
2nd Law of Thermodynamics
Friction Force
4. If the force and the distance applied is in opposite directions...
Constructive interference
work is negative
Deceleration
Buoyant Force - Buoyancy
5. +Net Heat added to the system +Net Work done on the system
tangent
Newton's second law (F = ma)
Change in Internal Energy of a system
Capacitors in parallel
6. If the force and the distance applied is in the same direction...
Energy Released by Nuclear Fission or Fusion Reaction
Ohm's Law
work is positive
Refraction
7. Friction always does ___________ because frictional forces always act against the direction of motion.
Doppler effect
Spring Force - Work
To calculate how far did the projectile travel
negative work
8. 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
Relativistic Length Contraction
Concept of a field
Work
Sinusoidal motion
9. 'rotational equivalent of force'; a force applied so as to cause an angular acceleration. t = FxLxsin ?
Newton's second law (F = ma)
Torque
Capacitance of a Capacitor
Sinusoidal motion
10. Whenever something is in the air - it's in a ___ - even when it is being tossed upwards - downwards or at an angle.
free fall
Index of Refraction
Centripetal Force
Doppler Effect
11. 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.
Doppler Effect
Lever
Energy of a Photon or a Particle
velocity and displacement
12. F = BxAxcos ? Force caused by a magnetic field on a moving charge F = qxvxBxsin ?
Relativistic Time Dilation
Magnetic Flux
Inductors during an increase in current
Centripetal Force (F=- mv2/r)
13. 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.
Blackbody Radiation and the Photoelectric Effect
Translational equilibrium (Sum of Fi = 0)
displacement
= kinetic friction
14. Distance travelled per unit time
speed
Flow of Heat through a Solid
Electromagnetic force
Radioactive Decay Rate Law
15. 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).
Speed - velocity (average and instantaneous)
Angular Speed vs. Linear Speed
Analysis of pulley systems
Freely falling bodies
16. Addition of two waves when the crest of one overlaps the crest of another - so that their individual effects add together. The result is a wave of increased amplitude.
Constructive interference
Three kinds of strain: unit - less ratios
vector fashion
Kirchoff's Laws
17. Q = mc ? T (MCAT !) and Q = mL
Thermodynamics
Quadratic Formula
Kirchhoff's rules
one direction as positive and another as negative
18. P = I
2nd Law of Thermodynamics
Electric Power
Magnetic Flux
Relativistic Mass Increase
19. ?S = Q / T (Phase changes only: melting - boiling - freezing - etc)
Entropy change at constant T
Periodic Waves
Constructive interference
Bernoulli's Equation
20. SFx = 0 and SFy = 0
Torque force at Equilibrium
Inductors during an increase in current
same amount of work
Instantaneous speed
21. I. Linear: strain = ?L / L II. Shear: strain = ?x / L III. Volume: strain = ?V / V
Three kinds of strain: unit - less ratios
Sinusoidal motion
round
Newton's first law - inertia
22. 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.
Hooke's Law
Capacitors in parallel
Center of mass
terminal velocity
23. If the force is acting in one direction - but the object moves in a perpendicular direction - then...
Magnetic Field around a wire
negative
Heating a Solid - Liquid or Gas
no work is done
24. Horizontal: x-x?= v?xt + 0 Vertical: y-y? = v?xt +
Projectile Motion
Relativistic Time Dilation
Rotational Kinetic Energy
Kinetic friction
25. When the centripetal force is taken away (Such as when the string snaps) - the object will...
scalar
The momentum of a bomb at rest
fly off in a path tangent to the circle at the point of snap
> kinetic friction
26. Ainxvin = Aoutxvout A= Area v = velocity
Elastic collisions
Newton's second law (F = ma)
same amount of work
Continuity of Fluid Flow
27. 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
Newton's first law - inertia
Centripetal Force (F=- mv2/r)
Static friction
Friction Force
28. FF =
Friction Force
Friction
fly off in a path tangent to the circle at the point of snap
Concept of a field
29. The vector sum of the momenta of all the shrapnel from the explosion.
horizontal component
The momentum of a bomb at rest
Momentum
no work is done
30. Gravity decreases with the square of the distance. If the distance increases two fold - gravity decreases by a factor of four.
Law of gravitation (F = Gm1m2/r^2)
Amount of work done in gravitational field is path - independent
Angular frequency
tangent
31. F=mv^2/R=m?r
static friction
displacement
Centripetal Force
Density
32. On Earth - the rate of acceleration is g - which is ______.
Apparent weightlessness
Electric Power
9.8 m/s2
Thermal Expansion
33. Force equals mass times acceleration. Fnet = SFExt = mxa
34. 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.
The strong force: also called the nuclear force
Capacitors in parallel
The displacement for a quarter around the circle (pi/4 radians or 45 degrees) - the displacement
velocity and displacement
35. F = BxAxcos ?
Energy of a Photon or a Particle
Elastic collisions
horizontal component
Magnetic Flux
36. 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.
37. Beta=sqrt 1- v^2/c^2
2nd Law of Thermodynamics
Lorentz Transformation Factor
Entropy change at constant T
Inductors during an increase in current
38. T = torque = Ixa I = moment of inertia = mxr
39. ?U = QNet + WNet
First Law of Thermodynamics
Kinetic friction
Ohm's Law
Newton's Second Law
40. When something is laying still on a horizontal surface - the normal force is ___________ to the weight.
Refraction
Centripetal Force (F=- mv2/r)
scalar and a scalar
equal and opposite
41. VL = Vcellxe - t / (L / R) I = (Vcell/R)x[ 1 - e - t / (L / R) ] L / R = t = time constant
Inductors during an increase in current
Static friction
Concept of a field
Lorentz Transformation Factor
42. L = L0 (1 + a? T )
constant
Translational equilibrium (Sum of Fi = 0)
Linear Expansion
Lorentz Transformation Factor
43. In an object going down the inclined plane at constant velocity: parallel component of gravity...
= kinetic friction
negative work
vertical component
Linear Momentum
44. Vector - has direction - rate of change in displacement.
velocity
Momentum - Impulse
Relativistic Mass Increase
terminal velocity
45. Pushing an object at constant speed up a frictionless inclined plane involves the ___________ as directly lifting the same object to the same height at constant speed.
Doppler Effect: when d is decreasing use + vo and - vs
same amount of work
Speed - velocity (average and instantaneous)
Energy Released by Nuclear Fission or Fusion Reaction
46. 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.
Heating a Solid - Liquid or Gas
velocity
Mechanical Energy
Weight
47. Roughly 50 orders of magnitude weaker than the strong force. Responsible for weight (not mass!). Also - responsible for planet orbits.
scalar and a scalar
To calculate how far did the projectile travel
Density
Gravity
48. The normal force at an inclined plane is equal to the weight __________ of the incline angle (see inclined planes).
Energy (conservation)
times the cosine
First Law of Thermodynamics
terminal velocity
49. X = Axcos(?xt) = Axcos(2xpxf xt) ? = angular frequency f = frequency
Freely falling bodies
Concept of a field
Heating a Solid - Liquid or Gas
Sinusoidal motion
50. Total kinetic energy before = total kinetic energy after.
Three kinds of strain: unit - less ratios
acceleration
Magnetic Field around a wire
Conservation of kinetic energy