Sorry for the late response.
If E is constant, that integral would equal the product (E)(area). So there's a positive flux, which implies that that region isn't uniform.
Homework Statement
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a) In a certain region of space, the volume charge density p has a uniform positive value. Can E be uniform in this region? Explain.
b) Suppose that in this region of uniform positive p there is a "bubble" within which p=0. Can E be uniform within this bubble? Explain...
I can't show the free body diagram but i have the tension of the cable, gravity, air resistance, water resistance (friction?), normal force (buoyancy?). Is it because leaning back causes gravity to have a torque that counters the water resistance?
Air resistance acts across the front of the skier (equivalent to being concentrated at the center of mass), and water resistance, which exerts more force, acts along the skis. The tension acts along her arms, probably near the center of mass.
Homework Statement
Why must a water skier moving with constant velocity lean backward? What determines how far back she must lean? Draw a free-body diagram for the water skier to justify your answers.
Homework Equations
Equilibrium: Fnet=0 and Torquenet=0
rcenter of...
If the linear velocity is decreasing (it should be due to gravity), the rotational velocity also decreases. So static friction needs to act uphill to slow the ball down?