Need some help with Phyics Final

A hungry bear weighing 660 N walks out on a beam in an attempt to retrieve a basket of food hanging at the end of the beam (Fig. P12.42). The beam is uniform, weighs 200 N, and is 6.40 m long; the basket weighs 80.0 N.


Figure P12.42

   
    (b) When the bear is at x = 1.00 m, find the tension in the wire and the components of the force exerted by the wall on the left end of the beam.
    1 N (tension)
    2 N ( Fx)
    3 N ( Fy)
    (c) If the wire can withstand a maximum tension of 925 N, what is the maximum distance the bear can walk before the wire breaks?
    4 m

That's a really small bear.

No wonder he's hungry

how wide is this plank?    bears are kinda wide.....

balance the forces

A satellite of mass 190 kg is placed in Earth orbit at a height of 100 km above the surface.

    (a) Assuming a circular orbit, how long does the satellite take to complete one orbit?
    1Your answer was incorrect, but has changed from what was graded. h
    (b) What is the satellite's speed?
    2 m/s
    (c) What is the minimum energy necessary to place this satellite in orbit (assuming no air friction)?

>>6

Do your own damn test.

a. the equation for the amount of time in your period in a circular orbit is [eqn]2pi*sqrt(a^3/u)

where a equals your altitude plus the radius of the earth and u equals the gravitational constant.

b. the formula for the velocity of a circular satellite is [eqn]sqrt(u/R)

where R equals the radius of your circular orbit

>>7

god damn it. can someone teach me how to use this stupid [math] and [eqn] thing properly?