A) 0.914 N
B) 9.14 N
C) 91.4 N
D) 914 N
Correct Answer: C
Solution :
: For motion up the plane \[P=F+mg\sin \theta \] \[=\mu R+mg\sin \theta \];\[=\mu mg\cos \theta +mg\sin \theta \] \[=mg(\mu \cos \theta +\sin \theta )\] \[=10\times 9.8(0.5\times \cos 30{}^\circ +\sin 30{}^\circ )\] \[=98(0.5\times 0.865+0.5)=98\times 0.5\times 1.865\] \[=91.385\text{ }N=91.4\text{ }N.\]You need to login to perform this action.
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