Okon

A ladder 20m long rest aganist a vertical wall so that the foot of the ladder is 9m from the wall.

A singly charged positive ion has a mass of 3.20*10^_26kg . after being accelerated from rest through a p.d of 833v,the ion enter magnetic field of 0.920T a long a direction perpendicular to the direction of the field.cal.the radius of the path.