The distance from the ground to the floor of the trailer is 22 inches. The length of the ramp is 44 inches. What is the mechanical advantage of this simple machine? A.
1/2
B.
2
C.
1/3
D.
22

found in the nucleus

has mass of one amu

b.

explanation:

10.0

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.