A) 5
B) 10
C) 15
D) 20
Correct Answer: D
Solution :
The force, slides down an inclined plane of angle \[\alpha \] is \[=mg\sin \alpha .\] When it is kept stationary, therefore must be in upward direction. If the body moves up an inclined plane the minimum retardation is \[g\sin \alpha \]. Hence total upward force \[=2\,mg\sin \alpha =20N\]You need to login to perform this action.
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