3. If mass is added to the cart and the experiment is repeated (call this case #2), will the time it takes to travel to the cart stop be shorter, longer, or the same as it will be for case #1 when there was no added mass? Explain your reasoning.

An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill