# Physics

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 Author: timothynank ID: 9110 Filename: Physics Updated: 2010-03-08 14:49:20 Tags: physics Folders: Description: physics Show Answers:

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1. What do scalar quantities only have?
A magnitude/size
2. Vector quantities have a m______, d______ and a p___ of a_______
• Magnitude
• Direction
• Point of application
3. Speed is the r____ of c_____ of d______
• Rate
• Change
• Distance
4. Speed is a s____ quantity
scalar
5. speed=
• speed= total distance
• total time
6. For constant acceleration situations, the average speed is also equal to the a______ of the i____ and f____ speeds.
average of the initial and final speeds
7. s= ___ speed+____ speed
2
• s= initial speed + final speed
• 2
8. Velocity is the r___ of c____ of d__________.
Velocity is the rate of change of displacement.
9. Velocity is s_____ in a given d_______
Velocity is speed in a given direction
10. Acceleration is the r____ of c_____ of v______
Acceleration is the rate of change of velocity
11. acceleration=final __X___ - initial __X___
y
• acceleration=final velocity - initial velocity
• time
12. Mass is a property of a body that ____ ____
resists change
13. Weight is a ____ on a ____ due to the ___________ ____ of the _____

Words: force - mass - gravitational field - Planet
• Weight is a force on a mass due to the gravitational field of the Planet
14. Weight c_____ from _____ to _____
• Weight changes from planet to planet
15. Weights can be compared using a b_____
balance
16. Weight=_____ x _______ ____ _______
Weight=mass x gravitational field strength
17. IS WEIGHT MEASURED IN NEWTONS OR KILOGRAMS ?????
newtons OF COURSE
18. IS MASS MEASURED IN NEWTONS OR KILOGRAMS????
kilograms
19. Density is the _____ per unit ______
Density is the mass per unit volume
20. density= ______
• mass
• volume
21. Density can represented by the letter _
ρ or D
22. Density is measured in __/___3 or g/m3
Kg/m3 or g/cm3
23. A force is a p___ or p___; it can change the s____, d______, and/or s____ of an object.
• A force is a push or pull; it can change the shape, direction, and/or speed of an object.
24. force=____ x ________
force=mass x acceleration
26. A moment is the t_____ affect of a f______.
A moment is the turning affect of a force.
27. Moment=f____ x p_________ d_________ from the pivot
Moment=force x perpendicular distance from the pivot
28. Moments are measured in _______ _______.
Moments are measured in Newton metres (Nm)
29. When there is no r_______t f____e AND no r______g t____ing a___t, a system is in e________m.
When there is no resultant force AND no resulting turning affect, a system is in equilibrium.
30. Work done=f____ x d______e in the direction of the force = change in e____y

or W=Fd=ΔE
Work done=force x distance in the direction of the force = change in energy

or W=Fd=ΔE
31. Work done is in _____
Work done is in Joules (J)
32. Momentum=m____ x v_____
Momentum=mass x velocity

or p=mv
33. Kinetic energy is the e____ of a b_____ due to its m_____
Kinetic energy is the energy of a body due to its motion
34. Kinetic energy= 1/2 x m___ x v______2
Kinetic energy= 1/2 x mass x velocity2
35. Kinetic energy is measured in J_____ (J)
Kinetic energy is measured in Joules (J)
36. Gravitational potential energy is the e____ of a b____ due to its p____ in the gr_______ field.
Gravitational potential energy is the energy of a body due to its position in the gravitational field.
37. Gravitational energy=m____ x a________ due to g_______ x h_____ gained/lost
Gravitational energy=mass x acceleration due to gravity x height gained/lost
38. GPE=_ _ _
GPE=mgh
39. GPE is in J____ (J)
GPE is in Joules (J)
40. Efficiency=______ _____x 100%
_____ _____
• Efficiency=useful output x 100%
• total input
41. Power is the r___ at w___ e_____ is c_______
Power is the rate at which energy is converted
42. Power=w___ d____
t___ t____
• Power=work done
• time taken
43. Power=e____ c_____
t___ t____
• Power=energy change
• time taken
44. Power is measured in W____
Power is measured in Watts
45. Pressure=f____
a___
• Pressure=force
• area
46. Pressure is measured in _/_2, p____ (Pa), m__b_r
Pressure is measured in N/m2, pascals (Pa), millibar
47. FLUID PRESSURE=d____ of fluid x a_______ due to gravity x h____ of f____ above

or P=dgh
FLUID PRESSURE=density of fluid x acceleration due to gravity x height of fluid above

or P=dgh

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