OCR AS level Physics Unit 2 Detailed test
A thorough test, hopefully covering all areas of the OCR AS level Physics Unit 2 module.. for exam in Jan
Covers Mechanics Waves and Materials..
3.5 / 5 based on 11 ratings
- Created by: Rob Stewart
- Created on: 30-12-10 09:47
A curved Displacement-time graph represents?
Acceleration
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A straight-line on a displacement-time graph represents?
Uniform Velocity
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The gradient of a displacement time graph, (whether straight or curved) represents what?
Velocity
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When finding the gradient of curved displacement-time graphs..
Average velocity = Total Distance/ Total time
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What are the equivalent vector quantities for Distance and Acceleration?
Displacement and Acceleration
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What does the area underneath a speed-time graph represent?
Distance Travelled
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How is increasing acceleration/ deceleration shown on a velocity time graph
A curve
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Adding Vectors together to determine a resultant requires the use of mathematical theorems, one is trigonometry, choose another.
Pythagora
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What is meant by the term Inertia?
It is an objects resistance to a change in velocity
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Hence, ;) the formula for density is?
P = mass / Volume
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How is weight caulculated?
W = mass x gravitational field strength
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If a piece of wood has a density of 2,500kgm^-3 and a liquid has a density of 4.7gcm^-3.. will the wood float?
Yes
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What does a Vector quantity have that a scalar quantity doesn't have?
Direction
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The weight of an object is said to act through its.....?
Centre of Gravity
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!!Not a question, Just important formula's for conservation of energy, !!Choose kinetic energy formula as answer :)
Kinetic energy = 1/2 mass x velocity^2 (1/2mv^2)
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Name tensile strain formula
Strain = extension / original length
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A moment is the turning effect of a force, but how is a moment defined..?
Moment = Force x perpendicular distance from pivot
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Youngs Modulus is found by the gradient of a stress strain graph, but what is the formula.
E = Tensile stress / Tensile Strain
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Waves: know these main key terms, choose top one as answer!! write down the definitions to these key terms..
Displacement - how far a point on the wave has move from an undisturbed position
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What are the SUVAT equations otherwise known as? Rememeber this, if you are asked to use SUVAT's this name gives you extra information ;)
Constant acceleration Formulae
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State the wave equation..
speed = wavelength x frequency
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Resolving Vectors into vertical and horizontal components also involves trigonometry. What is the general formula for resolving Vector (V) horizontally? !!When θ (theta) is the angle in between the Vector V and the component you are finding!!
V (x) = V sin θ
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Same as above, but what is the vertical component of Vector V?
V(y) = V sin θ
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A couple is a pair of equal forces, acting in opposite directions the turning force produced by a couple is usually called Torque.. how is this calculated?
Torque of a couple = Size of one of the forces x Perpendicular distance between the forces
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Can a polarised wave only oscillate in one direction..?
Yes
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Make a the subject of this equation. v = u + at
a = (v - u) / t
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This causes interference, but can the interference be constructive as well as destructive
Yes
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remember Youngs double slit experiment, including examples with both single slits and double slits.. also , what is the formula for fringe spacing
X = (Distance from slits to screen/wavelength) / distance between slits
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State newtons 2nd law
F = M A
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When a graph of force against extension is plotted, with force on the y axis and extension on the x... what does the area under the graph represent.
Elastic Strain Energy
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As you move out from the centre of the screen the light fringes get....
Brighter
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Use Suvat's to determine the acceleration and displacement of a toy boat, travelling for 5s, starting at 0.5m/s and finishing at 3.8m/s.
Acc = 0.66 Disp = 10.75m
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When an object is in free-fall, what is said to be the only force that is acting upon it?
Gravity
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Vertical and Horizontal motions of a projectile are independent?
True
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The refractive index of a material tell us how much the material slows down light, name the formula used for refractive index calculations...
1n2 = n2/n1
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Snell's Law is used to calculate the refractive index using angles, state Snell's law.. where i is the incident angle and r is the angle of refraction.. n1 is the material light is coming from n2 is the material the light travels into!!
n1 sin i = n2 sin r
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Name formula for tensile stress
Stress = force / cross-sectional area
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When terminal velocity is reached...
The frictional forces = The driving forces
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Work done is another name for Energy transferred, but how is it calculated?
Work Done = force x distance moved
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State the two conditions for interference to occur..
2 waves have to have same frequency and wavelength and be in phase
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The force applied is not always applied in the direction of motion, what formula is used to allow for this..?
W = Fs cos θ
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The equation for calculating power is .. ( can also be expressed as P = force x Velocity) P = FV
Power = work done / time
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However, if you are trying to determine the velocity of a curved displacement-time graph at a specific time, how would you do this..?
Just use the formula Average velocity = distance / time
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What does the gradient of a velocity time graph tell you?
Acceleration
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Other cards in this set
Card 2
Front
A straight-line on a displacement-time graph represents?
Back
Uniform Velocity
Card 3
Front
The gradient of a displacement time graph, (whether straight or curved) represents what?
Back
Card 4
Front
When finding the gradient of curved displacement-time graphs..
Back
Card 5
Front
What are the equivalent vector quantities for Distance and Acceleration?
Back
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