A horizontal disk with a radius of 0.10 m rotates about a vertical axis through its center. The disk starts from rest at t = 0, and has a constant angular acceleration of 2.1 rad/s )
At what value of t will the radial and tangential components of the linear acceleration of a point on the rim of the disk be equal in magnitude?

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

When does your body conduct current more readily?