A hoop rotates about an axis through its center with an angular velocity of 40.0 rad/s. If the rotational
kinetic energy of the hoop is 400 J, its angular
momentum is

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)