Recent content by lking226

or a solenoid? i know this has something to do with solenoids...

v is velocity of the rod when it is moved across the magnet.

Homework Statement I need to design a lab that will give me 5 points that produce a constant slope. Homework Equations I want to use the equation for emf E=Blv I would re-arrange it to make E/Bv = l Where B and v are my constantly increasing data points, E is measured by some sort of...

Homework Statement I need to find the force of tension in 5 pairs of cross wire supports (10 wires total) 15-25 feet off the ground that support an average high school football stadium. Homework Equations Sum of F = Ft + ? The Attempt at a Solution I don't even know where to...

got it, thanks guys!

is the kinetic energy-work theorem net work = change in kinetic energy? so then, w = 1/2mvf^2-1/2mvi^2, but vf is 0 because the arrow is stopped in the hay so really w = -1/2mvi^2. does that stay negative?

Homework Statement A 1kg arrow hits a bail of hay and penetrates 47.0cm. The average frictional force of the hay on the arrow is 2500.0N. What was the original velocity of the arrow? Homework Equations Ffr = uk x Fn The Attempt at a Solution I'm completely lost, can someone please...

so i put that into the conservation of energy formula and solve for final height! thanks!

the velocity in the y direction will equal 0.

okay so after i have vix = 20.785 and viy = 12, what do i do with those?

Homework Statement A ball is ikicked off a 100.0 m canyon at an angle of 30.0 degrees above the horizontal with a velocity of 24.0 m/s. What maximum height does it reach above the canyon floor? Homework Equations WNC = KE + PE The Attempt at a Solution WNC = 1/2mvf^2 - 1/2mvi^2 +...

Thank you so much!

38187.71?

4.50 kg x 9.8 m/s x 50.0 m = k x 0.340m k = 6485.3 ?

so then just mghi = kxf^2