Q. A bucket filled with dirt of mass 18 kg is suspended by a rope that hangs over a pulley of mass 29 kg and radius 0.30 m. Everything is initially at rest, but someone is careless and lets go of the pulley and the bucket then begins to move downward. What is the speed of the bucket when it has fallen a distance of 3.0 m?
Q. A proton is placed in an electric field of intensity 700 N/C. What is the magnitude and direction (towards or away from the field) of the acceleration of this proton due to this field? The charge on a proton is +1.6 x 10-19 C and the mass of a proton is 1.67 x 10-27 kg.