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The Big Thrill

The Big Thrill. Section 4.1. Roller Coaster Fun. When did Kris’ expression change?. Measuring Velocities and Calculating Acceleration. How do you calculate speed? What do you need for it to be a velocity? How do you calculate acceleration?. Vocabulary.

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The Big Thrill

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  1. The Big Thrill Section 4.1

  2. Roller Coaster Fun • When did Kris’ expression change?

  3. Measuring Velocities and Calculating Acceleration • How do you calculate speed? • What do you need for it to be a velocity? • How do you calculate acceleration?

  4. Vocabulary • Scalar – a quantity that has magnitude, but no direction • Vector – a quantity that has both magnitude and direction

  5. Scalar Quantities • Time • Temperature • Volume • Mass • Speed

  6. Vector Quantities • Velocity • Acceleration • Force • Weight

  7. Vocabulary • Speed – the change in distance per unit time; speed is a scalar; it has no direction • Velocity – speed in a given direction; displacement divided by the time interval; velocity is a vector quantity; it has magnitude and direction • Acceleration – The change in velocity per unit time

  8. WHAT IS SPEED? Δd vav Δt

  9. WHAT IS ACCELERATION? Δv a Δt

  10. Practice Problems • A roller coaster changes from a speed of 4 m/s to 16 m/s in 3 s. Calculate the magnitude of the acceleration of the ride?

  11. Practice Problems • A cart is 10 cm long. It travels through a photogate in 2 s. Calculate the cart’s speed.

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