Please answer true or false a-c

A charge moving at right angles to a uniform # (Into the page) field moves in a circle at constant speed because F and u are always perpendicular to each other. X p (A) (B) Figure 1: 1. A proton moves perpendicular to a uniform magnetic field B at a speed of 1.00 x 10' m/s and experiences an acceleration of 2.00 x 1018 m/s2 in the negative x-direction when its velocity is in the positive y-direction(see figure 1(A)]. (a) The radius r, The cyclotron angular velocity we, the magnitude and direction of the field can be found as follows[mp = 1.66x10 27kg , q = 1.60 x 10 19 CJ. Since ac = # - r = ac "I = 5m, and we = = = 2 x 10" Rad/s = 92 "m and from the second law: qu; Bsin90 = mpac - B = que mp's = 0.0217 and the direction of the field is into the page as indicated in the figure 1A (True, False). The acceleration, the velocity and the position can be written as(see figure 1(B)] [27 = we - $ = wet + do = wet and fo is a constant vector] ar = -ac(cos di + sin oj) = ac(-p) at = at(- sin di + cos oj = atd = at dur=0 - a=artat +as = ac(-p) (True, False) a: = With = 0 (c) The work done by the magnetic field is zero . This implies that the magnetic field can not change the speed of the particle (True, False)