Physics

Physics

Problem

A horizontal pull of magnitude FF is applied at 30∘30^{\circ} above the horizontal on a block resting on a rough horizontal table. Which expression gives the normal reaction RR exerted by the table on the block? a) R=mg+Fsin⁡30∘R = mg + F\sin 30^{\circ} b) R=mg−Fcos⁡30∘R = mg - F\cos 30^{\circ} c) R=mg−Fsin⁡30∘R = mg - F\sin 30^{\circ} d) R=mgR = mg

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