You lift a box weighing 30 n a distance of 0.5 m. calculate the work done on the box. 15 j 0 j 0.017 j 60 j

15 J

Explanation:

The work done in lifting the box is equal to the gain in gravitational potential energy of the box, equal to

where

F=30 N is weight of the box

d=0.5 m is the distance through which the box has been lifted

By substituting the numbers into the equation, we find

answer: the answer is a

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.