Magnus has reached the finals of a strength competition. In the first round, he has to pull a city bus as far as he can. One end of a rope is attached to the bus and the other is tied around Magnus's waist. If a force gauge placed halfway down the rope reads out a constant 1800 Newtons while Magnus pulls the bus a distance of 0.70 meters, how much work does the tension force do on Magnus? The rope is perfectly horizontal during the pull.

Explanation:

Tension of 1800 N will remain throughout the whole length of  rope.

force applied = 1800 N

distance moved = .7 m

work done = force x displacement

= 1800 x .7

= 1260 J .

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.