A man points his rowboat north, straight across a river of width 114.3 m.  The river flows due east.  The man starts across, rowing steadily at 0.90 m/s @ north and reaches the other side of the river at a point 207 m downstream from his starting point.  What is the speed of the river?

A hose lying on the ground shoots a stream of water upward at an angle of 40° to the horizontal. The speed of the water is 15 m/s as it leaves the hose. How high will it strike a wall which is 8 m away?

Problem 1.A boat traveling east covers a distance of 40.0 m in 20.0 s. It encounters a current moving at a speed of 2.50 m/s traveling north. Find the resultant velocity of the boat. 2.A riverboat travels with a velocity of 4.60 m/s from one shore to another. The velocity of the river is 2.30 m/s. If the width of the river is 72.0 m, how far does the boat travel downstream to reach the other shore? 3. A bus travels from west to east with a velocity of 11.5 m/s. A marble rolls on the surface of the bus floor with a velocity of 0.200 m/s north. What is the velocity of the marble relative to the road? 4. A human cannonball is launched from a cannon at 20 m/s at 45° above the horizontal. What is the maximum height of the human cannonball? 5. A human cannonball is launched from a cannon at 20 m/s at 45° above the horizontal. What is the range of the human cannonball? 6. A football is kicked from a tee at 12 m/s at 72° above the horizontal. What is the flight time of the football? 7. An…

A projectile is thrown from the top of a cliff with an initial speed of 25 m/s at an angle of 600 up from the horizontal. If the projectile lands 100 m from the base of the cliff how tall is the cliff?