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Unformatted text preview: Energy, Force, and Motion 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 SPEED Describes how fast an object is moving. Average Speed = distance time Velocity The speed of an object in a certain direction . Velocity V = velocity (meters/second) d = distance (meters) t = time (seconds) d V = t speed of an object in a certain direction. Velocity speed of an object in a certain direction. seconds 2 1 3 Speed=? Velocity=? 16 meters 12 meters 20 meters Total time= 4 seconds Numerator Denominator 5 12 Acceleration Acceleration is how quickly velocity changes over time. X L eh ray shun Speed 2 1 3 Meters/second Acceleration how quickly velocity changes over time. A = (V V ) time ___________ Acceleration the change in velocity over time. Acceleration = change in velocity time (v 2 – v 1 ) Acceleration = Time ________ V 1 = beginning velocity V 2 = ending velocity The graph below relates 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 Which of the following 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 What must happen to 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. Which of these describes 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 Scalar a measurement that does NOT contain direction ....
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 Spring '08
 Staff
 Acceleration, Convection, Energy, Force, Heat, Radiation, static electricity, Simple machine, Gravitational Magnetic

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