A cylinder rolls up an inclined plane, reaches some height, and then rolls down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are
a)
Up the incline while ascending and down the incline while descending
b)
Up the incline while ascending as well as descending
c)
Down the incline while ascending and up the incline while descending
d)
Down the incline while ascending as well as descending
A cylinder rolls up an inclined plane, reaches some height, and then rolls down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are
a)
Up the incline while ascending and down the incline while descending
b)
Up the incline while ascending as well as descending
c)
Down the incline while ascending and up the incline while descending
d)
Down the incline while ascending as well as descending
Question ID - 100526 | SaraNextGen Top Answer
A cylinder rolls up an inclined plane, reaches some height, and then rolls down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are
a)
Up the incline while ascending and down the incline while descending
b)
Up the incline while ascending as well as descending
c)
Down the incline while ascending and up the incline while descending
d)
Down the incline while ascending as well as descending
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A cylinder rolls up an inclined plane, reaches some height, and then rolls down (without slipping throughout these motions). The directions of the frictional force acting on the cylinder are |
|
|
a) |
Up the incline while ascending and down the incline while descending |
|
b) |
Up the incline while ascending as well as descending |
|
c) |
Down the incline while ascending and up the incline while descending |
|
d) |
Down the incline while ascending as well as descending |
(b)
When the cylinder rolls up the incline, its angular velocity 
is clockwise and decreasing
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This require an anticlockwise angular acceleration 
, which is provided by the force of friction 
acting up the incline
When the cylinder rolls down the incline, its angular velocity 
is anticlockwise and increasing. This requires an anticlockwise angular acceleration 
, which is provided by the force of friction 
acting up the incline