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- An 95-g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 77 cm. Part A What is the speed of the arrow as it leaves the bow? Express your answer to two significant figures and include the appropriate units. V2 = μA Value Units ?A rifle with a barrel length of 60 cm fires a 14 g bullet with a horizontal speed of 350 m/s. The bullet strikes a block of wood and penetrates to a depth of 14 cm. You may need to review (Page 131). For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Ready for takeoff. Part A What resistive force (assumed to be constant) does the wood exert on the bullet? Express your answer with the appropriate units. fk = Submit LO Part B μÀ - 11812.5 N Previous Answers Request Answer X Incorrect; Try Again How long does it take the bullet to come to rest after entering the wood? Express your answer with the appropriate units. μA t = 0.000533 ? S ?Ⓒ Macmillan Learning A small block of mass m slides to the left on a frictionless, horizontal surface with speed u. Then, the block slides up a rough ramp that has an incline angle of a. The coefficient of kinetic friction between the ramp and box is μ. The acceleration due to gravity is g. What is the height h of the block when its speed up the ramp equals cu, where 0 < c < 1? h = Incorrect ₂² (1-c²) 2g+mg sin(a) CV Final position m Rough surface Initial position m Frictionless surface
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