Topic: Acceleration Problems

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Presentation transcript:

Topic: Acceleration Problems Day 15 11-10-10 Topic: Acceleration Problems Objective: I will practice multiple ways to solve word problems that involve acceleration. Science starter: Is the object speeding up or slowing down? Draw a Motion diagram.

PUT IN REFERENCE SECTION #1 A C E L R T I O N a = Vf – Vi t #2 t = Vf-Vi a Vf = Vi + at Vi = Vf - at PUT IN REFERENCE SECTION #3 #4

1. A cart rolling down an incline for 5 1. A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/sec2. If the cart has a beginning speed of 2.0 m/sec, what is its final speed? Looking for: Given: Formula: Solution:

2. Johnny slides down the banisters at school (oops, that’s not allowed, is it?) He pushes off with a speed of 10 cm/sec. He accelerates at a rate of 3 cm/sec2 and it takes him 5 seconds to reach the bottom of the banister. Calculate his speed when he gets to the bottom. Looking for: Given: Formula: Solution:

3. A poorly tuned Yugo can accelerate from rest to a speed of 28 3. A poorly tuned Yugo can accelerate from rest to a speed of 28.0 m/s in 20.0 s. What is the average acceleration of the car? Looking for: Given: Formula: Solution:

4. A bus moving at 20 m/s slows at a rate of 4 m/s each second 4. A bus moving at 20 m/s slows at a rate of 4 m/s each second. How long does it take the bus to stop? Looking for: Given: Formula: Solution:

Challenge 1. If a car can go from 0. 0 to 60. 0 mi/hr in 8 Challenge 1.If a car can go from 0.0 to 60.0 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50.0 mi/hr? Looking for: Given: Formula: Solution: