Answers are -
A the pull of Box B on the wire
B the pull that string S exerts on Box A
C the pull that box B exerts on string S
D the pull that string S exerts on box B
E the force that box A exerts on box B

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?