When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the __________ pulley must be taken into consideration.
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard ?
A:
All points of the disc have the same velocity
B:
The centre of the disc has zero acceleration
C:
The centre of the disc has centrifugal acceleration
D:
The point on the disc making contact with the plane surface has zero acceleration
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