1. . , :
1) ;
2) ;
3) ;
4) .
2. m , 800 , V = 72/. F. 0,05.
3. m = 2 F x(t) = A + Bt + Ct2 + Dt3, A, B, C, D (C = 1 /2, D = 0,2 /3). t1 = 1c t2 = 5c. t 0?
4. 2 45 . , 0,4 , .
5. m F = Fcos(ωt), F, ω = const. , .. - , t = 0 ,
6. m X(Y) x = Acos(ωt), y = Bsin(ωt), A, B, ω = const. , .
7. m = 2 V = 36 / , 40 . ?
8. , a = 30.
1) , m = 0,1.
2) a, .
9. ˸ m = 70 , V = 360 /, , 500 . , , ?
9. m = 200 , ℓ = 3 , ( ), 1 . .
..
1. F m = 10 S(t) S(t) =10t×(12t)? a(t), S(t) , V(t).
2. m F = Fsin(ωt). V = 0 r =0. V(t) r(t).
3. m. :
1) , ;
2) ;
3) ,
4. m = 1 . T, :
1) = 5 /2
2) .
5. , m 15 , , V V(t) = 0,7t. , 0,03.
|
|
6. 2000 ( R = 40 ), 15 . ?
7. , R = 90 (. .). α V = 5 /?
8. , d=20 , . 0,8.
9. , 80. . , , , 0,9 . 10 /. .