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Motion- Speed Practice Problems1. If Steve throws the football 50 meters in 3 seconds, what is the average speed (velocity) or the football?3823335209550Speed = 50 m / 3 s = 16.7 m/s 00Speed = 50 m / 3 s = 16.7 m/s Given: t= 3 sec , d= 50 mWork: Find: s736600338455Speed = Distance / Time 00Speed = Distance / Time Formula: 2. If it takes Ashley 3 seconds to run from the batter’s box to first base at an average speed (velocity) of 6.5 meters per second, what is the distance she covers in that time?3937000318135 Distance = (6.5 m/s)(3 s) = 19.5 m00 Distance = (6.5 m/s)(3 s) = 19.5 mGiven: t= 3 sec , s=6.5m/secWork: Find: d279400291465Distance = (speed)(time)00Distance = (speed)(time)Formula: 3. Bart ran 5000 meters from the cops at an average speed (velocity) of 6 meters/seconds before he got caught. How long did he run?3936999243840FormulaTime = 5000m = 833.3 s 6 m/s 00FormulaTime = 5000m = 833.3 s 6 m/s Given: d=500m, s= 6m/secWork: 850900288290Time = Distance speed00Time = Distance speedFind: d Formula: 4. If Justin races his Chevy S-10 down Highway 37 for 2560 meters in 6 seconds, what is his average speed (velocity)?3914775266065Speed = 2560 m / 60 s = 42.7 m/s 00Speed = 2560 m / 60 s = 42.7 m/s Given: 2560 meters, 60 secondsWork: 851535377825Speed = Distance / Time 00Speed = Distance / Time Find: s Formula: 3136900522605 Distance = (20m/s)(500s) = 10000 m00 Distance = (20m/s)(500s) = 10000 m5. Mike rides his motorcycle at an average speed (velocity) of 20 meters/second for 500 seconds, how far did he ride?Given: s= 20m/s, t=500sWork: 851535375285Distance = (speed)(time)00Distance = (speed)(time)Find: dFormula: 4508500474980Time = 200 m = 25 s 8 m/s 00Time = 200 m = 25 s 8 m/s 6. Sarah backstrokes at an average speed of 8 meters per second. How long will it take her to complete the race of 200 meters length?Given: d=200m, s=8m/secWork: 852170396875Time = Distance speed00Time = Distance speedFind: tFormula: 3709035658495 speed = 20 cm / 5s = 4 cm/s 00 speed = 20 cm / 5s = 4 cm/s 7. Tina’s calculations of the tarantula found that the spider was able to cover 20 centimeters in 5 seconds. What was the average speed of the spider?Given: t= 5sec, d=20cmWork: Find: s96583553340Speed = Distance / Time 00Speed = Distance / Time Formula: 7. How many miles does a car move after travelling 45mph for 8 hours?Given: S = 45mph, T = 8 hours Work: d = (45mph)x(8 hrs) = 360 miles851535363855Distance = (speed)(time)00Distance = (speed)(time)Find: D Formula: 8. How long does it take a car to move 100 miles at a constant speed of 28 mph?Given: d=100miles, s=28mphWork: t= 100miles/ 28mph = 3.57 hrs852170231775Time = Distance speed00Time = Distance speedFind: tFormula: 9. A biker rides 35 miles for 5.5 hours. What is the speed of the biker?Given: d=35 miles, t= 5.5hrsWork: s= 35 miles / 5.5 hrs = 6.36 mphFind: s85217048895Speed = Distance / Time 00Speed = Distance / Time Formula: 10. 3 time trials are taken for a marble rolling for a distance of 3 meters. The times are 4.5 s, 5 s, and 5.6 seconds. Determine the average time for rolling and then calculate the average speed for the marble?Given: d= 3 m, t= 4.5 s, 5 s, and 5.6 s = 4.5 + 5 + 5.6 = 5.03s 3 Work: s = 3 m / 5.03 sec = .59m/sFind: sFormula: Speed = Distance / Time ................
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