Find in exact form the unit vector in the same direction as #veca=4hati-7hatj#?
2 Answers
Mar 22, 2018
Explanation:
Given:
The unit vector is:
Substituting into the equation for
Mar 22, 2018
Explanation:
#"the unit vector in the same direction as "vec(a)#
#•color(white)(x)u_a=vec(a)/|vec(a)|#
#"where "|vec(a)|=sqrt(x^2+y^2)#
#"here "x=4" and "y=-7#
#rArr|vec(a)|=sqrt(4^2+(-7)^2)=sqrt65#
#rArru_a=4/sqrt65hati-7/sqrt65hatj#