KinematicsHard
Question
A disc is performing pure rolling on a smooth stationary surface with constant angular velocity as shown in figure.
Options
A.At any instant, the acceleration of top most point is 
B.At any instant, for the lower most point of the disc velocity is zero, acceleration is zero.
C.At any instant, for the lower most point of the disc velocity is v, acceleration is .
.D.At any instant, for the lower most point of the disc velocity is zero, acceleration is .
.Solution
As the disc in combined rotation and translation, each point has a tangential velocity and a linear velocity in the forward direction.
From figure
vnet (for lower point) = v - Rω = v - v = 0.
and Acceleration =
+ 0 =(Since linear speed is constant) Hence (D).
Create a free account to view solution
View Solution FreeMore Kinematics Questions
You have 5 different strings with weights tied at various point, all hanging from the ceiling, and reaching down to the ...Drops of water fall from the roof a building 9 m. high at regular intervals of time, the first drop reaching the ground ...A ball is released from the top of a tower of height h metres. It takes T seconds to reach the ground. What is the posit...From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit...A particle has initial velocity of (î + ĵ) m/s and an acceleration of (î + ĵ) m/s2. Its speed after ...