posted by joshua .
A river has a current of 5 m/s. A boat tries to head directly across at 4 m/s. When the boat reaches the other side it is 30m downstream.
How wide is the river ?
how long did it take to get across?
how wide is the river?
A 80KG hockey player has a coefficient of friction u=0.08 between her skates and ice. What is the force of friction on the player?
0.08(80 x 9.8)
If the hockey player is coasting, what is the net force?