A car slows down from 14 m/s to 6 m/s in 3 seconds. What is the car’s acceleration? A) 6 m/s/s

B) -2.67 m/s/s

C) 8 m/s/s

D) 2.67 m/s/s

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

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.