Objective

To calculate the average speed of an object
To calculate the average velocity of an object.

Equipment.

Blank paper
Calculator (a calculator is located on the widget page)
Pen or pencil

Homework:


1. A fire hose ejects a stream of water at an angle of 35 Degrees above the horizontal. The water leaves the nozzle with a speed of 25 M/S. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?

2. The highest barrier that a projectile can clear is 13.5m, when the projectile is launched at an angle of 15 Degrees above the horizontal. What is the projectiles launch speed?

3. A rocket is fired at a speed of 75 m/s from ground level at an angle of 60 Deg. above the horizontal. The rocket is fired towards an 11m high wall which is located 27m away. By how much does the rocket clear the top of the wall.

4. Suppose the water at the top of Niagrara Falls has a horizontal speed of 2.7 m/s just before it cascades over the edge of the falls. At what vertical distance below the edge does the velocity vector of the point downward at a 75 Deg. angle below horizontal?

5. Water from a garden hose that is pointed 25 Deg. above the horizontal lands directly on a sunbather lying on the ground ground 4.4M away in the horizontal direction. If the hose is held 1.4m above the ground at what speed does the water leave the nozzle?