Question

A cat is walking along a hallway moving away from a sleeping dog. A graph of the distance between the cat and the dog as a function of time is shown to the right. A physics student uses 2) Distance, meters 20 the equation "rate times time equals distance" to calculate the speed of the cat at time 6 seconds: 16 12 distance / time 16.0 m/6s=2,667 m/s. rate 8 4 (a) What, if anything, is wrong with this calculation? If something is wrong, identify and explain how to correct all errors. If this calculation is correct, explain why. 5 6 7 2 4 8 Time, seconds s). (3) to (b) What is the average acceleration of the cat from 4 to 6 seconds? (c) Another student claims that this average acceleration value is also the cat's instantaneous acceleration at every point on its journey? Is this student correct? Explain. In a ballistics test, a bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10.0 cm. 3)

Answer 1

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