Question 3 (11 pts) Assume the distance I1 to I1' to be 40.0 cm and the distance G to O to be 40 meters. If the grating has 1600 lines/cm, what is the wave length of light that formed I1

the correct answer is "inertia"

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.