Does the speedometer of a car measure speed or velocity? Explain.
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Does the speedometer of a car measure speed or velocity?
Explain.
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- A traffic radar records the speed of cars driving through an intersection. It records these statistics:Mean36.2 mphMedian = 28.5 mphMode30.0 mphWhat is the most common speed of a car driving through the intersection?What is the physical significance of the signs? Is a positive acceleration always speeding up? What is happening when velocity and acceleration have different signs?3. A car travels along the three legs of an equilateral triangle. The speed for the three legs is as follows: 60 mph, 30 mph, and 40 mph. Calculate the average speed for the trip. с. 40тph d. 50mph
- Which of the following objects is undergoing uniform circular motion> a. An object speeding up at a constant rate while following a circular path. b. An object whose velocity is changing at a constant rate in a given direction. c. An object undergoing acceleration with a constant magnitude directed towards the centre of its circular path. d. An object that is traveling at constant speed around a circular path.If you drop a textbook off a building that is 100 m tall, how much time will pass before the textbook hits the ground? Select one: Oa. Between 5 and 10 seconds Ob. Less than 1 second Oc. Between 1 and 5 seconds Od. More than 10 seconds oWhich of the following describes an object which is NOT speeding up? a) v = -1 m/s, a = -8 m/s^2 b) v = 3 m/s, a = 4 m/s^2 c) v = 7 m/s, a = -2 m/s^2 d) v = 0 m/s, a = -6 m/s^2
- Describe the difference between someone who is accelerating and someone who is only moving at a constant velocity. A person moving a constant velocity will ‘feel’ how fast they are moving. A person accelerating does not feel the acceleration. A person who is accelerating will ‘feel’ that acceleration, but the person moving at constant velocity will not feel the motion. Both of the above. None of the above.A cyclist goes around a level circular track at a constant speed. Do you agree or disagree with the following statement? Since the cyclist’s speed is constant, the acceleration is zero. Explain