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SPEED AND VELOCITY

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Speed and Velocity Speed is the rate at which distance is covered. S= distance/time S=d/t Units m/s, mi/h, km/s, inch/day Velocity is speed in a given direction. V=distance/time, with direction V=d/t, East

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To solve Math problems in Science class State known variables in problem. Include a diagram if needed. Perform any necessary conversions. Write down the appropriate equation. Insert the known variables into the equation. Solve and give answer in correct significant figures and with correct units.

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A car travels 410-m in 8.5-s. What is the average speed? d=410-m (known variable) t=8.5-s(known variable) s= d/t(appropriate equation) s=410-m/8.5-s(insert known variables into equation) s=48-m/s(answer with correct significant figures and units)

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Practice A car travels 720-km West in 9.5-hours. What is the average velocity? d=720-km t= 9.5-h v=d/t v= 720-km/9.5-h v=76-km/h, West

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Practice How far will you travel if you maintain an average speed of 16 m/s for 45 s? s=18 m/s t=45 s d=st d=(18 m/s)(45s) d=810 m

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Practice A bicyclist travels with an average speed of 9.5 km/h. How long does it take her to travel 6500 m? s=9.5 km/h d=6500 m = 1 km/1000m = 6.5 km t=d/s t=6.5 km/9.5 km/h t=0.68 h= 3600 s/1 h = 2400 s

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EXAMPLE 1 Finding Perimeter and Area SOLUTION Find the perimeter. P = 2l + 2w Write formula. = 2 ( 8 ) + 2( 5 ) Substitute. = 26 Multiply, then add. Find.

EXAMPLE 1 Finding Perimeter and Area SOLUTION Find the perimeter. P = 2l + 2w Write formula. = 2 ( 8 ) + 2( 5 ) Substitute. = 26 Multiply, then add. Find.

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