N m 9 1points s e rcp 913p 012wi an automobi

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Unformatted text preview: utomobi l e havi ng a mass of 1,000 kg i s dr i ven i nto a br i ck wal l i n a saf ety test. The bumper behaves l i ke a spr i ng wi th constant 6.00 106 N/m and i s compr essed 3.60 cm as the car i s br ought to r est. What was the speed of the car bef or e i mpact, assumi ng no ener gy i s l ost i n the col l i si on wi th the wal l ? m /s www.we ba ssign.ne t/we b/Stude nt/Assignme nt- Re sponse s/la st? de p= 5966130 4/5 6/13/13 HW 16 10.–/7 points S e rCP 9 13.P .015. A hor i zontal bl ock­spr i ng system wi th the bl ock on a f r i cti onl ess sur f ace has total mechani cal ener gy E = 55.3 J and a maxi mum di spl acement f r om equi l i br i um of 0.216 m. (a) What i s the spr i ng constant? N /m (b) What i s the ki neti c ener gy of the system at the equi l i br i um poi nt? J (c) If the maxi mum speed of the bl ock i s 3.45 m/s, what i s i ts mass? kg (d) What i s the speed of the bl ock when i ts di spl acement i s 0.160 m? m /s (e) Fi nd the ki neti c ener gy of the bl ock at x = 0.160 m. J (f ) Fi nd the potenti al ener gy stor ed i n the spr i ng when x = 0.160 m. J (g) Suppose the same system i s r el eased f r om r est at x = 0.216 m on a r ough sur f ace so that i t l oses 14.6 J by the ti me i t r eaches i ts f i r st tur ni ng poi nt (af ter passi ng equi l i br i um at x = 0). What i s i ts posi ti on at that i nstant? m www.we ba ssign.ne t/we b/Stude nt/Assignme nt- Re sponse s/la st? de p= 5966130 5/5...
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