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Acceleration. Physics Date: _______. Engagement. Objectives. describe how the outcome of a changing velocity solve mathematically for acceleration define acceleration and give examples of units. Acceleration. Questions What is acceleration?
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Acceleration Physics Date: _______
Objectives • describe how the outcome of a changing velocity • solve mathematically for acceleration • define acceleration and give examples of units.
Acceleration Questions What is acceleration? Is acceleration a scalar or vector quantity? Facts the rate at which velocity is changing Vector quantity
Acceleration Questions What is one equation for acceleration? What are the units? Facts Acceleration= change velocity time interval a = ∆v/∆t m/s2 km/h2 m/s/s km/hs
Reach for the stars Questions The units for accelerations are: m/s2km/h2 m/s/s km/hs Explain why! Facts Acceleration= change velocity time interval a = ∆v/∆t Units for v = m/s Units for t = s When combined, time is squared giving m/s2
Velocity and Acceleration Topic What happens if velocity changes? How can one accelerate? Facts Acceleration results Same as velocity; Speed up Slow down Change direction Change speed and direction
Check for Understanding Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?
Check for Understanding What is the average acceleration of a car that goes from rest to 16 m/s in 8 seconds? Solve a = v/t = (16m/s) (8s) = 2 m/s/s = 2 m/s2 Unknown a Known v = 16 m/s t = 8 s Equation a = v/t
Class work • Practice Problems • velocity and acceleration
Closing • What is happening in this picture with respect to: • Velocity • acceleration
Homework • Complete handout with practice problems • Study notes • Quiz on Wednesday, Sept 12(B) • Thursday, Sept 13(A)