20c because te mass of the object is larger than the table
T is the time for a whole round.
centripetal acceleration = V^2/R,
20 = 40^2 / R, find R = 40^2/20 = 40*40/20 = 80 m, right?
Now, one round is L = 2*pi*R = 2*pi*80 = 160*pi
And T = L/v (distance/speed) = 160*pi/40 = 4*pi seconds, or ~ 12.57 s
A) 20Newtons is the answer
Atoms gain energy as a solid changes to a liquid. If Adams energy during a change of state, they pull together by attractive forces and become more organized.
