Question

the gravitational field in a region is given by I=(3i+4j) N/kg. work done by this field is zero when a paritle is moved along a line. what is the equation of the line?

Answer 1

@douglaswinslowcooper

Answer 2

well workdone is zero when field is normal to the displacement ok!!!
now first tell me what is the slope of the line

Answer 3

slope would be tan(theta)

Answer 4

yup I=3i+4j what is tan(theta) for this equation???can u tell me

Answer 5

its 4/3

Answer 6

so what is the slope of the line perpendicular to it??

Answer 7

its -(3/4) is'nt it?

Answer 8

yes because product of slopes of two perpendicular line is =-1
now as u know y=mx
so \[y=\frac{ -3 }{ 4 }x\]
thats the equation of the line

Answer 9

oh now i get it thank u