A girl travels along the circumference of a circle of radius 14 m. What is her total distance travelled and displacement when she has described half a circle, three fourth of a circle and full circle.

87.976meters, 43.988 meters, 65.982 meters

Explanation:

Given data

Radius= 14m

Let us find the circumference of the circle

This is equivalent to the total distance covered

C= 2πr

C= 2*3.142*14

C= 87.976 meters

Hence the total distance is

87.976meters

The displacement when she has covered 1/2 the circle is

=87.976/2

=43.988 meters

The displacement when she has covered 3/4 the circle is

=87.976* 3/4

=65.982 meters

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6