Chapter 4 Sample Problems

# Chapter 4 Sample Problems - of 500 m toward a point...

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Chapter 4 Sample Problems

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1. A rabbit runs across a parking lot on which a set of coordinate axes has, strangely enough, been drawn. The coordinates of the rabbit’s position as functions of time, t, are given by x = -0.31t 2 + 7.2t + 28 y = 0.22t 2 – 9.1t + 30 (a) At t = 15 s, what is the rabbit’s position vector r , in unit vector notation and in angle magnitude-angle notation? (b) What is the rabbit’s velocity, v at t = 15 s, in unit vector notation and in magnitude-angle notation? (c) What is the rabbit’s acceleration, a , at time t = 15 s in unit vector notation and in magnitude-angle notation?
2. The diagram below shows a rescue plane flying at 55.0 m/s at a constant elevation

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Unformatted text preview: of 500 m toward a point directly over a boating accident victim struggling in the water. The pilot wants to release a rescue capsule so that it hits the water very close to the victim. What should be the angle φ of the pilot’s line of sight to the victim when the release is made? 3. The diagram illustrates the ramps used for the current world-record motorcycle jump set by Jason Renie in 2002. The ramps were H=3.00 m high, angled at R θ =12.0 o , and separated by distance D=77.0 m. Assuming that he landed halfway down the landing ramp and that the slowing effects of the air were negligible, calculate the speed at which he left the launch ramp....
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## This note was uploaded on 01/11/2012 for the course PHYSIC 1 taught by Professor Fairport during the Spring '11 term at Fairfield.

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Chapter 4 Sample Problems - of 500 m toward a point...

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