A 2.2 kilogram steel block is at rest on a steel table. A horizontal string pulls on the block.
(a) Find the minimum string tension needed to move the block?
______N
(b) If the string tension is 21 Newton, find what is the block's speed after moving 1.0 meter?
______ m/s
(c) If the string tension is 21 Newton and the table is coated with oil, find what is the block's speed after moving 1.0 meter?
______ m/s