Harry Potter decides to take Pottery 101 as an elective course to satisfy his artistic requirements at Hogwarts. He puts clay (m = 4.00 kg)
on the edge of a potter’s wheel
(r = 0.730m),
which is initially stationary. It then begins to spin the wheel with uniform acceleration, reaching a final angular velocity of 2,800 rpm in 2.80 s.
(a) What is the velocity of the clay when the initial 2.80 s have elapsed?
Mrs
(b) What is the centripetal acceleration of the clay initially and after the initial 2.80 s has elapsed? (Enter the magnitudes of your answers.)
ac,i = m/s^2
ac,f = m/s^2
(c) What is the magnitude of the constant tangential acceleration responsible for starting the clay in circular motion?
m/s^2 I hesitate to do them without seeing your work.
a. SPEED=w*r=2PI*2.800*radius
b. initially? doesn’t it suck? the wheel is stationary.
final? w^2*r=(2PI*2.8)^2* radius
vs. tangential acceleration=change in radial velocity/time
= 2PI*2.8*radius/time