Speed, Velocity & Acceleration. Speed (s) – rate at which an object is moving Does not depend on direction speed = distance ÷ time (s = d/t) Constant.

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Presentation transcript:

Speed, Velocity & Acceleration

Speed (s) – rate at which an object is moving Does not depend on direction speed = distance ÷ time (s = d/t) Constant Speed – speed that does not change Speed

A car drives 100 meters in 5 seconds What is the car’s speed? s = (100 m) / (5 s) = 20 m/s 100 m Speed

A racecar is traveling at 85.0 m/s. How far does the car travel in 30.0 s? What is the distance the car travels? s = d/t → d = s × t d = (85 m/s) × (30 s) = 2550 m Speed

A rocket is traveling at 10 km/s. How long does it take the rocket to travel 30 km? What is the time it takes the rocket to travel? s = d/t → t = d/s t = (30 km) / (10 km/s) = 3 s Speed

Velocity (v) – speed with direction velocity = displacement ÷ time V = Δx /t Velocity

Distance traveled? Displacement? Speed? Velocity? cm s2 s3 s4 s5 s Example 7 cm +3 cm (7 cm) / (5 s) = 1.4 cm/s (+3 cm) / (5 s) = +0.6 cm/s