A shopper walks Eastward 3.2 meters and then westward 7.2 meters what is the distance and magnitude and direction ?

Explanation:

Given that,

A shopper walks Eastward 3.2 meters and then westward 7.2 meters.

Let East is positive direction and west is negative direction.

Initially, he walks +3.2 m and finally, he walks (-7.2 m)

Distance = 3.2 m + 7.2 m = 10.4 m

Displacement = final position - initial position

= -7.2-3.2

=-10.4 m

The negative sign shows west direction. It means that direction of shopper is due west.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)