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# HW-2 - HW-2 Due 7:01am on Saturday Oc Note You will receive...

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HW-2 Due: 7:01am on Saturday, October 13, 2012 Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy Exercise 3.4 The position of a squirrel running in a park is given by . Part A What is , the -component of the velocity of the squirrel, as function of time? ANSWER: Correct Part B What is , the y-component of the velocity of the squirrel, as function of time? ANSWER: Correct

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Part C At 5.79 , how far is the squirrel from its initial position? Express your answer to three significant figures and include the appropriate units. ANSWER: Correct Part D At 5.79 , what is the magnitude of the squirrel's velocity? Express your answer to three significant figures and include the appropriate units. ANSWER: Correct Part E At 5.79 , what is the direction (in degrees counterclockwise from +x-axis) of the squirrel's velocity? Express your answer to three significant figures and include the appropriate units. ANSWER: Correct Exercise 3.15 Inside a starship at rest on the earth, a ball rolls off the top of a horizontal table and lands a distance from the foot of the table. This starship now lands on the unexplored Planet X. The commander, Captain Curious, rolls the same ball off the same table with the same initial speed as on earth and finds that it lands a distance 2.61 from the foot of the table. = 4.65 = 2.03 = 70.0
Part A What is the acceleration due to gravity on Planet X? ANSWER: Correct Enhanced EOC: Exercise 3.30 At its Ames Research Center, NASA uses its large “20-G” centrifuge to test the effects of very large accelerations ( hypergravity ) on test pilots and astronauts. In this device, an arm 8.84 long rotates about one end in a horizontal plane, and the astronaut is strapped in at the other end. Suppose that he is aligned along the arm with his head at the outermost end. The maximum sustained acceleration to which humans are subjected in this machine is typically 12.5 .

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HW-2 - HW-2 Due 7:01am on Saturday Oc Note You will receive...

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