PHYS 2A SAMPLE MIDTERM 2

PHYS 2A SAMPLE MIDTERM 2 - PHYS 2A SAMPLE MIDTERM &...

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PHYS 2A    CLOSED BOOK     Spring 2010  1. A 0.15 kg arrow is fired horizontally. The bowstring exerts a  constant force pf 65 N on the arrow over a distance of 0.45 m.  Determine: a) How much work is done by the bowstring on the arrow. b) The speed of the arrow when it leaves the bow. 2. A 2.00 kg crate starting at rest slides down a rough 5.00 m  long ramp, inclined at 25º with the horizontal. If 20.0 J of  energy is lost due to friction what is the speed of the crate  at the bottom of the incline? a) 0.98 m/s  b) 1.9 m/s  c) 3.2 m/s  d) 4.7 m/s  e) 6.8 m/s  3. A 1000 kg sports car accelerates from zero to 25 m/s in 7.50  s. What is the average power delivered by the automobile  engine? a) 27.9 hp   b) 40.6 hp  c) 55.9 hp  d) 70.2 hp  e) 82.4 hp  (Recall 1hp = 746 W) 4. Alex throws a 0.15 kg rubber ball down onto the floor. The ball’s 
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This note was uploaded on 09/08/2010 for the course PHYS 2A at San Jose State University .

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PHYS 2A SAMPLE MIDTERM 2 - PHYS 2A SAMPLE MIDTERM &...

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