A60.0 kg object is moving east at 8.00 m/s, and then slows down to 4.00 m/s. how much work was done?

Work can be calculated using the formula:
w = 0.5m ( vf^2 - vi^2)
where m is the mass of the object
vf is the final velocity of the object
vi is the initial velocity of the object

w = 0.5 ( 60 ) [ (4^2) - ( 8^2 ) ]
w = -1440 J was the work done by the object

Answer

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

explanation

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

It is either a  proton or a neutron im almost positive. hope this .