More Related Content
Force
- 2. Energy, Force, andMotion identifying energy transformations; Identifying and analyzing the transfer of heat energy by conduction, convection, and radiation interpreting a phase diagram; describing and calculating velocity and acceleration; comparing Newton’s three laws; calculating mechanical advantage; understanding the work of simple machines Waves, Electricity, and Magnetism investigating light and sound phenomena and comparing light to sound; Doppler effect; describing the causes of static electricity; constructing and analyzing series and parallel circuits; describing the relationship between voltage, current and resistance and relating electricity and magnetism and common applications
- 3. SPEED Describes how fastan object is moving.
- 4.
- 5. Velocity The speed ofan object in a certain direction.
- 6. Velocity d V= t speed of an object in a certain direction. V = velocity (meters/second) d = distance (meters) t = time (seconds)
- 7. Velocity speed of an object in a certain direction. 0 3 seconds 1 2
- 8. Speed=? Velocity=? Total time= 4 seconds 20 meters 12 meters 16 meters
- 9.
- 10.
- 12. Acceleration is howquickly velocity changes over time. X L eh ray shun 0 3 Speed 1 2 Meters/second
- 13. Acceleration how quickly velocitychanges over time. (Vfinal - Vinitial) A = ___________ time
- 14. Acceleration the change invelocity over time. change in velocity Acceleration = time (v2 – v1 ) ________ Acceleration = Time V1 = beginning velocity V2 = ending velocity
- 15. The graph belowrelates speed and time of four cars (1, 2, 3, and 4) traveling along a straight highway. Which two cars move with zero acceleration? 1 and 4 2 and 3 1 and 2 3 and 4
- 16. Which of thefollowing is certain to change as a ball accelerates? mass of the ball inertia of the ball velocity of the ball force acting on the ball
- 17. What must happento an object in order to accelerate it? A net force must be applied. Some weight must be removed. Its frictional coefficient must be reduced. It must contain momentum.
- 18. Which of thesedescribes the object with the largest acceleration ? An object with a small change in velocity over a small change in time An object with a small change in velocity over a large change in time An object with a large change in velocity over a small change in time An object with a large change in velocity over a large change in time
- 19. Scalar a measurement thatdoes NOT contain direction. Egg sample: Speed Vector a measurement that contains direction. Egg sample: Velocity
- 20. Forces of Nature Gravitational Magnetic
- 21. Mass and Inertia Theuniverse consists of matter in motion
- 22. The greater themass the harder it is to move. And . . . the harder it is to stop moving.
- 23. Lower mass objectsare easier to move . . .and to stop moving.
- 24. NEWTON’s Laws 1st Law of Motion : An object remains at a constant speed in a straight path ,until a net force acts on it.
- 25. NEWTON’s 1st Lawof Motion is the law of ih ner shah An object will remain at a constant speed (unless disturbed).
- 26. the force ofa moving body. the mass times velocity of an object p=m•v Momentum = mass x velocity (Kgrams) (meters/second)
- 27. Momentum = massx velocity Higher mass higher momentum Higher velocity higher momentum p=m•v
- 28. includes velocity. So, ithas direction. Momentum points in the direction of motion.
- 29. Conservation of momentum Whenobjects collide, all of the momentum goes somewhere.
- 30. Conservation of momentum Whenobjects collide, all of the momentum goes somewhere.
- 31. Conservation of momentum Whenobjects collide, all of the momentum goes somewhere.
- 32. Conservation of momentum Whenobjects collide, all of the momentum goes somewhere.
- 33. NEWTON’s 2nd Law ofMotion : An object that has a force acting on it will change its speed (accelerate).
- 34. NEWTON’s 2nd Law ofMotion : f = m•a force = mass • acceleration f = net force (newtons) m = mass (Kilograms) a = acceleration (meters/second2)
- 35. NEWTON’s 2 nd Lawof Motion : f = m•a mass of the club acceleration of the club force of the club
- 36. Net force isthe total amount of Force (minus the forces that cancel each other out). Force of gravity Force of muscles Net force
- 37. When the netforce is Zero. -> NO movement When the net force is NOT Zero. -> movement
- 38. Static Equilibrium Balancedforces When all forces are balanced. The net force is Zero. There is NO movement. 3 Kg ? 2 Kg
- 39. 50 N 50 N 50N 50 N
- 40. NEWTON’s 3rd Law ofMotion: For every action there is an equal and opposite reaction.
- 41. NEWTON’s 3rd Law ofMotion: For every action, there is an equal and opposite reaction.
- 42. NEWTON’s 3rd Law ofMotion: For every action, there is an equal and opposite reaction.
- 44. Gravity Inertia Friction Balanced or unbalanced? Action Reaction
- 45. Gravity UN balanced BALL Speed (m/s) Ground Time (mSec)
- 46. Inertia PUTTER UN balanced Speed (m/s) BALL Time (mSec)
- 47. Friction SKATE UN balanced Speed (m/s) Time (Sec)
- 48. A car istraveling down a hill. Which of the following will affect the amount of energy the car has? how long the car is the time of day how much the car weighs the color of the car
- 49. Friction the resistiveforce that occurs when two surfaces travel past each other. causes physical deformation generates heat
- 50. Friction theresistive force that occurs when two surfaces contact each other.
- 51. Oliver the dogdoesn't want to walk in the rain. He can make his owner pull harder on the leash to get him out the door by sitting on the vinyl floor. sitting on the tile floor. sitting on the carpeted floor. sitting on the wood floor.
- 52. Pauline needs tomeasure the sliding friction of a brick. How should she go about doing this? attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground drag the brick by a string attached to a spring scale so that it gradually speeds up drag the brick by a string attached to a spring scale along the surface of a table at a constant speed and read the force hang the brick from a string attached to a spring scale and read the force
- 53. Sliding friction-the drag forcecreated when the surface of one object slides across the surface of another object.Friction Lab Sliding Object Surface force (Newstons)
- 54. terminal velocity gravitywill accelerate an object until air resistance (friction) does not allow it to go any faster.
- 55. In the absenceof air resistance, which of these objects will fall at the fastest rate when dropped? the ball with a mass of 75 kg the ball with a mass of 25 kg the ball with a mass of 10 kg
- 56. Pressure is theamount of force exerted over a certain area. Pressure = Force Area
- 57. Pressure = Force(newtons) Area (m2) 1 Pascal = 1 Newton/meter2
- 59. Distance{ W = f• d Force Distance {
- 60.
- 61.
- 62. Gravitational force o INCREASESwith Mass o DECREASES with Distance
- 63. All objects inthe universe are attracted to each other by the force of effort. friction. gravity. inertia.
- 64. Four pairs ofobjects have the masses shown below. If the objects in each pair are the same distance apart, the gravitational force between the objects in which pair is greatest? 1 kilogram and 1 kilogram 1 kilogram and 2 kilograms 2 kilograms and 1 kilogram 2 kilograms and 2 kilograms
- 65. As an astronauttravels from Earth to a space station orbiting Earth, what happens to her mass and weight? Her mass decreases, but her weight remains the same. Her mass increases as her weight decreases. Her mass remains the same, but her weight decreases. Her mass decreases and her weight also decreases.
- 66. What causes “weightlessness”? •Even in the space shuttle, there is a force of attraction exerted by the earth on the shuttle and its contents. • When the space shuttle temporarily “falls” toward the earth, the contents of the space shuttle appear to be weightless, but in fact they are falling with the space shuttle. This is called “freefall”.
- 67. Which hill wouldyou slide down the fastest? hill A hill B hill C It would take the same time to slide down all of the hills.
- 68. Projectile Motion Velocity (m/s) forward downward 50 19.6 39.2 29.4 9.8 0 0 3 seconds 1 2
- 69. Projectile Motion Velocity (m/s) forward downward 46 29.4 47 39.2 48 19.6 49 9.8 50 0 0 3 seconds 1 2
- 70. When an objectis thrown into the air, two forces and two motions affect the movement of the object. The object may be thrown horizontally with a certain force, but the vertical force of gravity combines to affect the motion. Slow projectile - shoot a Fast projectile - shoot a monkey monkey
- 71. Centripetal force The inwardforce on a spinning object, that stops it from going in a straight line. Perpendicular
- 72.
- 73. Centripetal force sen tripitul The inward force on a Spinning object.
- 74. Centripetal force The inward force ona Spinning object.
- 75. If you wuz‘n a Merry-go-round & yuz let go, Which wayz wud yu go?
- 76. A rocket movesforward when gases expelled from the rear of the rocket push it in the opposite direction. Hot gases are propelled out of the back of a rocket engine. The force of the gas in one direction (action) produces an opposing force (reaction) that propels the rocket forward.
- 77. • 1. Heavyfirst stage provides thrust for launch. • 2. First stage separates and falls to earth. • 3. Second stage ignites and continues with third stage. • 4. Second stage separates and falls to earth. • 5. Third Stage ignites. • 6. Third stage is discarded. • 7. Lunar vehicle proceeds to lunar orbit.
- 78. Satellites are usedfor communications, navigation, collecting weather data, and research, In addition, two-dozen Global Positioning Satellites give off signals that can be picked up by small receivers on earth. The receiver can then tell you where you are on earth’s surface. Centripetal Force is acting to pull the satellite toward the center and thereby keeps it moving in a circular path.
- 79. Space Shuttle Research Satellite 400 Km 6,000 Km GPS Communication Satellite 20,000 Km 35,800 Km