Acceleration - Georgetown ISD



AccelerationPart 1: The concept of accelerationAn object starts from rest and accelerates at +3 m/s2 for ten seconds. Its velocity at each second is shown. Fill in the missing velocities. 0 m/s +3 m/s ____ +9 m/s +12 m/s +15 m/s _____ +21 m/s +24 m/s +27 m/s _____An object with an initial velocity of +100 m/s undergoes an acceleration of -10 m/s2 for ten seconds. Its velocity at each second is shown. Fill in the missing velocities. +100 m/s +90 m/s ____ +70 m/s _____ _____ _____ +30 m/s +20 m/s +10 m/s ____An object with an initial velocity of -25 m/s undergoes an acceleration of +5 m/s2 for ten seconds. Its velocity at each second is shown. Fill in the missing velocities. -25 m/s -20 m/s _____ _____ _____ 0 m/s _____ _____ +15 m/s +20 m/s +25 m/s An object with an initial velocity of 0 m/s undergoes an acceleration of -2 m/s2 for ten seconds. Its velocity at each second is shown. Fill in the missing velocities. 0 m/s -2 m/s _____ _____ _____ -10 m/s _____ _____ _____ _____ Enter the correct signs of the acceleration into this table. You can refer to examples 1–4 for help.Speeding upSlowing down positive direction negative direction Circle the correct sign of the acceleration in each of these cases:An object speeding up in the positive direction has (positive) (negative) acceleration.An object slowing down in the positive direction has (positive) (negative) acceleration. An object speeding up in the negative direction has (positive) (negative) acceleration.An object slowing down in the negative direction has (positive) (negative) acceleration. Part 2: Problem solvingUse the interactive calculator on page 110 to check your work.9034048191500What acceleration does it take to reach 15 m/s (from rest) in 5 seconds?Suppose you are traveling 15 m/s. What acceleration does it take to stop in 3 seconds?Suppose you start with an initial velocity of 10 m/s and have an acceleration of -2 m/s2. What is your final velocity after 9 seconds?A car changes its speed from 0 to 20 m/s in 4 seconds. What is its acceleration?A car slows from 24 m/s to 6 m/s in 3 seconds. What is its acceleration?List its velocity at each second.time0 s1 s2 s3 svelocity+24 m/sWrite a multiple-choice question that requires the reader to understand that velocity and acceleration can have opposite signs. Part 3: Interpreting graphsThe motion of an object along a straight line is depicted in this graph. What is the acceleration of the particle during each of these time intervals? Show your work.253565514605000 seconds to 1 second? ________1 seconds to 3 seconds? ________3 seconds to 7 seconds? ________7 seconds to 10 seconds? ________2032003302000Circle the correct answer:Acceleration creates a (line of constant slope) (curve) on a v vs. t graph.Acceleration creates a (line of constant slope) (curve) on an x vs. t graph.Circle the correct answer:When acceleration is positive, the v vs. t graph has a (zero) (positive) (negative) slope. When acceleration is negative, the v vs. t graph has a (zero) (positive) (negative) slope.Sketch a position time graph that 8. Sketch a position time graph thatshows positive acceleration. shows negative acceleration.33742901593850015875016192500 ................
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