Problem Set 3 1.A truck covers 40.0 m in 8.50 s while smoothly slowing down to a final speed of 2.80m/s. a.find its original speed b.find its acceleration 2.A speedboat moving at 30.0 m/s approaches a no-wake buoy marker 100m ahead. The pilot slows the boat with a constant acceleration of -3.5 m/s2by reducing the throttle. a.How long does it take the boat to reach the buoy? b.What is the velocity of the boat when it reaches the buoy? 3.A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0 s at a constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.00 s. a.How long is the truck in motion? b.What is the average velocity of the truck for the motion described? 4.A ball starts from rest and accelerates at 0.5 m/s2while moving down an inclined plane 9.00 m long. When it reaches the bottom, the ball rolls up another plane, where after moving 15.0 m, it comes to rest.
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