In the drawing above, the distance from the ground to the floor of the trailer is 20 inches. The length of the ramp is 40 inches. What is the mechanical advantage of this simple machine? A. 2

B. 1/2

C. 1/3

D. 20

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

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.

increase masses, decrease separation

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explanation: