The angular Displacement x (rad) of a wheel undergoing Rotation is given by x=4t-2t^2. The Speed of particle on the rim 2s after it comes to memtary rest in 6m/s. The Diameter of wheel is?

Question

experimentx · Answer

the find the angular speed by w = dx/dt
put t=2, and get angular velocity ... use relation wr = s => w*r = 6 to find r.

anonymous · Answer

W = 4 - 4t

at t=2

4-8 = -4

Wr = V

r = V/W = 6/4 = 3/2

d = 3

experimentx · Answer

seems okay ... what's the answer?

anonymous · Answer

i dont knw but the options are   0.5  0.75   1.5   2