Respostas

2013-09-17T01:03:24-03:00
Simples IMG 1:

VR = vetor Resultante

VR² = 15² + 10²
VR² = 225 + 1000
VR = Raiz(1225)
VR = 35

IMG 2:

VR² = 15² + 10² - 2*15*10.0,8
VR² = 1225 - 240
VR = Raiz(985)