Segunda(Lei(de(Newton(–(Exercícios((Halliday)((

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Respostas:((

1. !"!!!!⃗ = 1,88!!;!"!!!!!⃗ = 0,684!!; !⃗ = (1,88!⃗ + 0,684!⃗)!(2. !⃗ = (0!⃗ + 0!⃗)!/!!;(!⃗ = (0!⃗+ 4!⃗)!/!!;!!⃗ =

(3!⃗ + 0!⃗)!/!!(3. ! = 2,93!!/!!(4. !3!!!!!⃗ = (−34!⃗ − 12!⃗)!(5. !2!!!!!⃗ = (−32!⃗ − 20,8!⃗)!; |!2|!!!!!!!!⃗ = 38,2!!;Θ = 213°(6. !2!!!!!⃗ = (−2!⃗ + 6!⃗)!(7. !⃗ = (0,86!⃗− 0,17!⃗)!/!!;(|!⃗| = 0,88!!/!!;(Θ =

−11,12°(8. |!"|!!!!!!!!⃗ = 241!!(9. ! = 9(10. !⃗ = −7,98!⃗!!(11. |!|!!!!!⃗ = 8,37!!;Θ = 227°;Θ = 235°(12. Θ = 56,3°(