Recent content by katie beisel

oh yeah 2pi rads = 0 + 1/2a(21.2 s)^2 i got a = .0272 rad/s^2

but i don't know Δθ?

Δθ = ωit + 1/2αt^2

so i got that one rotation takes .157 seconds but i still don't know where to go from there

oh whoops yeah then its .068 m im still not sure where to go from there

Homework Statement Two go-karts race around a course that has concentric circular tracks. The radius of the inner track is 15.0 m, and the radius of the outer track is 19.0 m. The go-karts start from rest at the same angular position and time, and move at the same constant angular acceleration...

1. The problem statement, all variables and given/known A hamster runs in its wheel for 2.7 hours every night. If the wheel has a 6.8 cm radius and its average angular velocity is 3.0 radians per second, how far does the hamster run in one night? Homework Equations w= delta theta/change in...

Homework Statement Rebecca goes on a popular ride at an amusement park that involves a cylinder rotating on a vertical axis, with a radius of 6.20 m. Rebecca stands inside, with her back against the wall of the cylinder. The ride rotates and presses Rebecca against the wall of the cylinder...

ok doubling the force tension gives me the right answer but I'm confused why that is. I don't understand why it pulls up twice even though its only connected to the chair.

one

well they have a combined force weight of 628 N so 348 N - 628 N = 64.1 (i messed up the first time)a which equals -4.3

i did that and i got -4.5 but the answer should be 1.06

Homework Statement A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley and then to...

i don't understand. using what equation?

Homework Statement A small block sits at the midpoint of a 2.0 m plank lying on a level floor. A student slowly raises one end of the plank until the block starts to slide. At that instant, the raised end is 0.55 m above the floor. Find the coefficient of static friction between block and...