Question

All problems must include: a sketch, a freebody diagram (or more than one if necessary), and a list of knowns and unknowns for full credit.

1. Myrtle the Kitten loves anything that sparkles. She has stolen one of Dr. Woodney’s earrings ( mass = 20 g) off the dresser and is playing with it by batting it around on the tile floor of the house. If immediately after Myrtle hits the earring it is traveling across the kitchen floor at 5 m/s, and 3 s later it is traveling at 2 m/s across the floor: a. What is the coefficient of kinetic friction, μk between the earring and the floor? b. If you tripled the mass of the earring, what would the speed of the earring be after it traveled 4 m if it had the same initial velocity?

Answer 1

Known Uv, mits Apply Apply accelenchon lauch in a = V = 9.5 = 21 mle IN Unknown uk, v to Vys fk = UK N = malking a=-4kg uk = 0.102 TV -alk - 9.8 mg from wolkenery thesin WoDKE to. 1 (9.8) (4) ofk.d = m CV²_) • ukimga = 12 m (v²u²) = 1/2 (227) V= 4.14 m/s