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pratice test 1

# pratice test 1 - 1 A displacement vector R in an xy plane...

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1. A displacement vector R in an xy plane is 20 m long @ an angle of 25 degrees. What are the x and y components? 2. The Steamboat Gesyer in Yellowstone National Park, capabale of shooting hot water from the ground at a speed of 48 m/s. How high does the water reach before falling back earthward? 3. Sara starts from rest and accelerates at 3 m/s^2 for 4 s. She then slows down to 8 m/s for the next 5 s. She drives at that speed for 3 s. At the end of her trip, How far has she traveled? What is her average speed? What was her average acceleration for the trip? 4. A motorcycle is moving at 30 m/s when the rider applies the brakes to decelerate at a constant rate. During the first 3 s after braking the speed of the cycle is 15 m/s. What distance was traveled during the deceleration before coming to rest? 5. A curious kitten taps a ball of yarn with its paw, displacing the yarn 17.5 m in 2.0 s. What was the yarns acceleration? What is the average speed of the ball after 17.5 m ?

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