Chapter 2: Q14CQ (page 79)
Is it possible for velocity to be constant while acceleration is not zero? Explain.
No, it is not possible for velocity to be constant while acceleration is not zero.
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A weather forecast states that the temperature is predicted to be −5ºC the following day. Is this temperature a vector or a scalar quantity? Explain.
(b) Now calculate the distance taking into account the time for sound to travel up the well. The speed of sound is 332.00 m/s in this well.
Give an example in which there are clear distinctions among distance traveled, displacement, and magnitude of displacement. Specifically, identify each quantity in your example
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 11.5 m/sand accelerates at the rate of 0.500for 7.00 s.
(a) What is his final velocity?
(b) The racer continues at this velocity to the finish line. If he was 300 mfrom the finish line when he started to accelerate, how much time did he save?
(c) One other racer was 5.00 mahead when the winner started to accelerate, but he was unable to accelerate, and travelled at 11.8 m/suntil the finish line. How far ahead of him (in meters and in seconds) did the winner finish?
An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s2as it goes through. The station is 210m long.
(a) How long is the nose of the train in the station?
(b) How fast is it going when the nose leaves the station?
(c) If the train is130 m, when does the end of the train leave the station?
(d) What is the velocity of the end of the train as it leaves?
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