If the height a barrel is raised above the ground triples, then its PE will be a.) 1/9
b.) 1/3
c.) the same
d.) 3x
e.) 6x
ab.) 9 x

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?