1、1大学物理甲(上)习题解答(第 1 章)1-1 (1) m/s)3168712txv(2)折返点 024dtt s)(2t m)(9x路程: 1789m1mxxl m/s)(4.3167tlv1-2 35.024tx25.1dttvta3dv)s(t )(4x)/s(4)m/s(621-3 jir63322tt)72jir)1()8(dtv /s(91(vjia62tt)m682jia1-4 (1) x05ty20xy(2) )/s(13)4()1( jijirtv(3) jitt0djadtv)s(1)m/s(1jiv )m/s(10d2jatv1-6 (a) 2hlx 22dhluthlt
2、x 21xhux(b) cosvuxucosv iviiia3223d1dhthxt 1-7 (1) jirtt0)5(2s)(1t jir105m)(51052r(2) 1dtvv /sv(3) ia0t )m/s(102a(4) )1(22 ttyxv 10d2tta )m/s(2510ta(5) )/s(07.522tn a1-8 (1) dvkt tk 0 dv tk0v(2) ttx01txt 0v)1ln(0txh x lu xo21-9 (1) ji52tviat4(2) t 023d)(dri jirt532jirt5)32((3) 3txty53/1)( xy1-14 (1)
3、 m68.724.12.21t0 atlv)m/s(84.36.7t(2) rad9.1Rl )m(5.62sincos2RRr)/s(28.3tv1-16 td2dtR2.0v.0tRa22n4.0tRa241tnt a )s(93.t )m/s(19.v1-17 (1) x 2i001tahgtvv 70.2iaght或: )m/s(12.892ia s)(70.t(2) m28970.40 gtxv1-18 u /s)(.022uv雨滴与竖直方向夹角: 4.65sin1v1-19 (1) ji43vm/s)(2yx 1.534tgt1xyv(2) ltyx)(751043l1-20 (1) gayx0 gttuyyyxx 8.194.0vv 2209.48195.4tttyxv 2.x(2) jir).(.tt jr)9.481(2tm/s(.)9.481(95.4d22jia tt /s(.).(2jjrtt uvv