Describing Motion A rocket traveling at 88 m/s is accelerated uniformly to 132 m/s over a 15 s interval. What is its displacement during this time?

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Presentation transcript:

Describing Motion A rocket traveling at 88 m/s is accelerated uniformly to 132 m/s over a 15 s interval. What is its displacement during this time? Objective(s)/SWBAT (Students will be able to): Cite kinematic equations Solve constant acceleration problems Activities: Derive 4 kinematic equations 2 or 3 example problems Closure: Students solve constant acceleration problems Assessment: Problem set Test Keystones: 3.2.B

Today Students will be able to: Site kinematic equations Solve constant accelerations problems Derive the kinematic equations Do problems 19, 21, 23 (odd year) Do problems 20, 22, 26 (even year) Keystones: 3.2.B

Third Equation Substitute the final velocity from the first equation into the second.

Describing Motion Starting from rest, a race car moves 110 m in the first 5.0 s of uniform acceleration. What is the car’s acceleration? Objective(s)/SWBAT (Students will be able to): Cite kinematic equations Solve constant acceleration problems Activities: Derive 4 kinematic equations 2 or 3 example problems Closure: Students solve constant acceleration problems Assessment: Problem set Test

Fourth Equation

Fourth Equation

Kinematic Equations

A person wearing a shoulder harness can survive a car crash if the acceleration is smaller than -300 m/s2. assuming constant acceleration, how far must the front end of the car collapse if it crashes while going 101 km/h?