物理新人教版必修一 优秀经典示范教案24(匀变速直线运

4?.?x=v0t+21at2?v=v0+at?v2-v02=2ax.?.?.?.?.?1.?.2.?.?1.?.2.?.?1?1.?.2.?vt2-v02=2ax.3.?.?.?.?.?2-4-1.?5?105 m/s2?0.64 m?2-4-1?x=21at2?t.?v=at?.?.?2-4-2?.?2-4-2?1.83?.?2.38?.?.?v=v0+at x=v0t+21at2?t?.?.?t?v=v0+at?t=avv0?x=v0t+21at2?x=22000)(2)(avvaavvv?=avvvvv2)()(22000?=?avv2202v2-v02=2ax?.?1.?v-t?xt?xv?t?v0?+?-?+?+?-?.2.?.?1?216 km/h?2 m/s2.?.?2-4-3?.?2-4-3?v0=216 km/h=60 m/s?v?0.?a=-2 m/s2.?v2-v02=2ax?x=avv2202?x=)/2(2)/60(0222smsm?=900 m?900 m.?.?.?v0=0?v=216 km/h=60 m/s?a=2 m/s2?v2-v02=2at?v2=2ax?x=av22=22602?m=900 m.?900 m?4 s?1 s?14 m?1 s?4 s?.?.?.?v0?a?v=v0+at?x=v0t+21at2?2001211140avatv?20/4/16smasmv?1 s?4 s?3 s?.x1=v0t4-21at42-?v0t3-21at32?x1=?16?4-21?4?42-?16?3-21?4?32?m=2 m 4 s?x=v0t+21at2=?16?4-21?4?16?m=32 m.?.?14=21at42-21at32?t4=4 s?t3=3 s?a=4 m/s2?1 s?x1=21at12=21?4?12 m=2 m 4 s?x2=21at42=21?4?42 m=32 m.?.?1?14 m?v0.5=114 m/s=14 m/s?v4=0?v4=v0.5+a?3.5?a=-4 m/s2?v=v0+at?v0=16 m/s?v3=4 m/s?1?x1=203?vt=204?1 m=2 m 4 s?x2=200?vt=2016?4 m=32 m.?.?.?1?1?.?.?.?2?v0?.?.?3?.?a?.?.?4?.?5?.?.?2?a?v?x?.?1?.?2?.?t?.?3?v-t?v-t?.?v-t?.?3?1.?.?v=20vv?t?x=vt?.2.?.?.3.?.?.?.4.?.?.5.?v-t?.?t?.?.?.?1.?1?.?2?.?3?.?4?.2.?1?.?.?2?.?3?.3.?v-t?.?.?2?3 m/s2?6 m/s?.?1?2?3?.?.?.?1?v?=v?at=v?3t=6?t=2 s?x=x?-x?=v?t-21at2=?6?2-21?3?4?m=6 m.?2?x?=x?21at2=v?t?t=32?v s=362?s=4 s v?=at=3?4 m/s=12 m/s.?3?.?1?2-4-4?x?2-4-4?x=x2-x1=v-t-21at2=6t-21?3t2=23?t-2?2+6?x?2-4-5?.?t=2 s?xm=6 m.?2-4-5 v2=at=3?2 m/s=6 m/s.?2?x=0?23?t-2?2+6=0?t=4 s?v4=at=3?4 m/s=12 m/s.?3?2-4-6?.?2-4-6?.?.?.?1.?s1=6t?s2=10t41?t2?1?_?.?2?_.?3?_.?1?6 m/s?10 m/s?0.5 m/s2?6t=10t41?t2 t=16 s.?2?vt=v0+at=?10-21?16?m/s=2 m/s.?3?.vt=v0+at?=6 m/s 10-21t?=6 m/s t?=8 s?s=10t?-41t?2-6t?=16 m?.?s=10t-41t2-6t=-41t2+4t.?s=-41?t-8?2+16.?t=8 s?s?16 m.?s=0?-41t2+4t=0?t=16 s?vt=v0-at=2 m/s.?1?16 s?2?2 m/s?3?16 m 2.?2-4-7?x?v1?a1?a2?A.a1=a2?B.a1?a2?C.a1?a2?D.a1?a2?2-4-7?.?v-t?.?t?t?x1=v1t+21a1t2?x2=21a2t2?x1=x2+x?a1-a2?t2+2v1t-2x=0?a1=a2?t?t=xv1?.?a1?a2?t?t=)(2)(8422121211aaxaavv?a1?a2?t?t?0?.?a1?a2?t=)(2)(8421212211aaxaavv?.?=4v12+8?a2-a1?x?0?.?=0?t?t?0?0?t?0?.?A?C?D.?2-4-8?v-t?.?2-4-8?a?a1=a2?t=t1?.?x.?b?a1?a2?t=t2?.?c?a1?a2?t3?x?x?.?x?.?d?t4?t4?.?ABCD?x?0?t4?v?v?t4?t4?t4?.t4?t4?v?v?.?t4?.?t?t4?v?v?.?S?BCE?S?FCD?t4?.?S?BCE=S?FCD.?ACD?.?.?.?.?1.?40?1?2?.2.?.?4?20021attvxatvv?v2-v02=2ax?v0?.?g?.?.?1.?vt=v0-gt?h=v0t-21gt2?vt2-v02=-2gh.2.?g?1?a=-g?vt=0?.?2?v0?-g?.?.?v0?vt?0?vt?0?h?h?.?1.?v0?.?a=-5 m/s2?x=22.5 m?vt=0?v2-v02=2ax?0-v02=2?-5?22.5?v0=15 m/s=54 km/h.2.?.?v0=10 m/s?x=1.2 m?v=0?a.?v2-v02=2ax?a=xvv2202?=2.121000?m/s2=3125?m/s2.3.?x.?v2-v02=2ax?x=avv2202?=520502?m=500 m?100 m?.?v2-v02=2ax?v02=v2-2ax?v02=?2 500-2?5?100?m2/s2=1 500 m2/s2?v0=1510 m/s.?.?.?.?.?.