Achild pulls a sled up a snow-covered hill. in the process, the child does 405 j of work on the sled. if she walks a distance of 15 m up the hill, how large a force does she exert on the sled?

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.