An athlete completes one round of circular track of diameter 200 meter in 40 sec. What will be the distance covered and the displacement at the end of 2 meter 20 seconds ?

400m

Explanation:

If An athlete completes one round of circular track of diameter 200 meter in 40 sec, we can write;

200m = 40sec

To determine the distance after 2min 20secs, we can write;

x = 2,min 20sec

x = 80sec

Divide both expression

200/x = 40/80

200/x = 1/2

x = 2×200

x = 400m

Hence the distance covered after 2min 20secs is 400m

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.