Wooden block sits on a level lab table. A string draped over a pulley connects to a bucket that can be filled with lead pellets. Maggie needs to measure how much applied mass (pellets $ bucket) is required to move the block along the table at a constant speed.
a. If the applied mass of the bucket and the lead pellets is 0.255 kg, and the block has a weight of 12 N, what is the value of μk?
b. If some extra pellets are added, explain the behaviour of the block.