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SCAN0011 - 9(10 points A car delivers 30 hp to its wheels...

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Unformatted text preview: 9. (10 points) A car delivers 30 hp to its wheels when moving at a constant speed of 22 m/s. What is the total resistance force (drag and friction) on the car? (1 hp = 746 W) P: 30M> (it?) 3 21,380 m ‘9 :3; (\Y 10. (10 points) A machine gun is attached to a railroad car that is free to roll on a frictionless track If the railroad car of mass 62,500 kg is initially at rest, how many bullets of mass 25 g would have to be fired at 250 m/s off the back to give the railroad car a forward speed of 0.5 m/s. (“.3 (“‘3‘“ 36: P; 12"" UxLLE— :: b _. —” 3 \S 0‘025 —— 5,009 EDMLLETS _ ...
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