Unformatted text preview: 5. For A=3i+j-k, B=-i+2j+5k, C=2j-3k, find C. (A-B) 6. The force acting on a particle varies as shown in the figure below. Find the work done by the force on the particle as it moves from a. From x = 0 to x = 8.00 m b. From x = 8.00m to x = 10.0 m c. From x = 0 to x = 10m 7. When a 4.00 kg object is hung vertically on a certain light spring that obeys Hooke’s Law, the spring stretches 2.50cm. If the 4.0 kg object is removed, how much work must an external agent do to stretch the same spring 4.00 cm from its unstretched position? 8. A 100gram bullet is fired from a rifle having a barrel 0.600m long. Assume the origin is placed where the bullet begins to move; the force exerted by the expanding gas on the bullet is 2 x 25 x 10 15 where x is in meters. a. Determine the work done by the gas on the barrel as the bullet travels the length of the barrel. b. If the barrel is 1.00 long, how much work is done...
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- Spring '11