A boy rides his bicycle which has wheels of radius 31.0 cm. If the boy accelerates from rest to a speed of 11.8 m/s in 30.0 s, what is the angular acceleration (in rad/s2) of the tires?

Aboat that travels with constant speed of 6.10 m/s in still water is to go directly across a river. the current in the river flows at 1.95 m/s. (a) at what angle must the boat be steered?

Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?