In the pulley arrangement shown, a 5.0 kg racoon (an animal sometime called a 'trash panda' because it is often found eating food in garbage cans) is hanging on a 1.0 kg log over the side of a table. They are attached to a cart of unknown mass, m. The racoon and the log are attached together (i. e. you consider them as though they are one object). The coefficient of friction between the cart and the table is 0.30. If the acceleration of the mass and cart is 2.0 ms2 . a) Find the force of friction on the cart n terms of 'm' (m will be in your answer)

b) Solve for the cart's mass 'm'

c) Find the magnitude of tension in the string

In the future, people will only enjoy one sport: electrodisc. in this sport, you gain points when you cause metallic discs hovering on a field to exchange charge. you are an electrodisc player playing the popular four disc variant. the disks have charges of qa = −8.0 µc, qb = −2.0 µc, qc = +5.0 µc, and qd = +12.0 µc. (1) you bring two disks together and then separate them. you measure the resulting charge of these two disks and find that it is +5.0 µc per disk. which two disks did you bring together? (a) a and b (b) a and c (c)a and d (d)b and c(e) b and d (f) c and d. (2) you bring three disks together and then separate them. you measure the resulting charge of these three disks and find that it is +3.0 µc per disk. which three disks did you bring together? a, b, and c (a) a, b, and d (c) a, c, and d (d) b, c, and d. (3) given the resulting charge of each disk measured in (b) is +3.0 µc, how many electrons would you need to add to a disk of this charge to electrically neutralize it? electrons