Really anxious. Thanks in advance to those who helped.
1. A rock is tied to a string and spun in a horizontal circle. The string is 1.8m long and the rock has an acceleration of 3.4m/s^2. What is the tangential velocity of the rock?
2. A marble rolls off the edge of a table that is 0.734m high. The marble is moving at a speed of 0.122m/s at the moment that it leaves the edge of the table. How far from the table does the marble land?
3. A 0.45kg ball is attached to the end of a cord of length 1.4meters. The ball is whirled in a circular path om a horizontal plane. The cord can withstand a maximum tension of 57.0 Newtons before it breaks. What is the maximum speed the ball can have without breaking?