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4. For Remington BDL 700 rife, its parameter: barrel length 24 inch (558.8 mm), bullet velocity is 820 need to calculate the acceleration of the bullet ( after you obtain the acceleration, you need to use the definition of acceleration to calculate t, what is t what is vi, finally you need multiple 10000 to the time you got. m/s. If I fire 1000 cartridges (bullets),what is real usage time of the barrel? Recall our class notes, you in the barrel), what is vi what is vy, what is s of 2 a*s 5. A student standing on the building at height 50.0 meter, shooting a yellow ball with velocity 20 m/s up, another student standing with him together, at same time, shooting a blue ball with velocity-20 m/s down. When does the yellow ball hit the ground? When does the blue ball hit the ground? What is yellow ball touch down velocity? What is blue ball touch down velocity?
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.5588 m (320广=(oft 2 as(0.5588) t0.013629 sec 3629 msec total ta3 629 Sec

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