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old 5 - oldhomewk 05 NOORANI ZOHEB Due 4:00 am Question 1...

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oldhomewk 05 – NOORANI, ZOHEB – Due: Jan 27 2008, 4:00 am 1 Question 1, chap 2, sect 7. part 1 of 1 10 points An object is released from rest at time t = 0 and falls through the air, which exerts a resistive force such that the acceleration a of the object is given by a = g bv , where v is the object’s speed and b is a constant. If limiting cases for large and small values of t are considered, which of the following is a possible expression for the speed of the object as an explicit function of time? 1. v = g t bt 2 2. v = g ( 1 e bt ) b 3. v = ( g e bt ) b 4. v = ( g + a ) t b 5. v = v 0 + g t, v 0 negationslash = 0 Question 2, chap 2, sect 5. part 1 of 1 10 points The Stratosphere Tower in Las Vegas is 1130 ft high. It takes 1 . 1 min, 48 s to ascend from the ground floor to the top of the tower using the high-speed elevator. The acceleration of gravity is 9 . 81 m / s 2 . Assuming that the elevator starts and ends at rest, and its acceleration has a constant magnitude when moving, find the acceleration
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