3) Three teams are playing tug-of-war using a tire with three ropes

attached. Each team exerts a force on the tire. F1 = 2,000V3 N

points toward the top of the page. F2 = F3 =2,000 N and each point

in the directions indicated on the diagram, 150 from from F, and 60

from each other.

a. Redraw the diagram, adding a useful coordinate system and

150

O

150

indicating the x and y components.

b. Find the components of each force.

F2 /

60

F3

c. Add the force vectors to find the magnitude and direction of the net force. Which

team, if any, will win?

4) A baseball pitcher is riding in a bus in the positive y direction at 25 m's. He throws a

baseball out the window at 40 m's in the positive x direction (relative to himself and the

bus).

a. Find the magnitude and direction of the ball's velocity relative to the ground

outside the bus.

b. What direction would he need to throw the ball (still at 40 m/'s) so that it would be

moving in the positive x direction relative to the ground outside the bus?

5) Hellings 4.8

6) A car drives horizontally (in the positive x direction) at 20 m's off a cliff. After driving

off, its acceleration is entirely in the -y direction. Thus, the x component of its velocity

will remain constant at 20 m's. After 10 s, it hits the ground below.

a. What is the y component of its velocity just before it hits the ground?

b. What is the magnitude and direction of its velocity just before it hits the ground?