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cuz when the wedge is in contact with the sphere for time T, in which it experiences constant force F, tangent of certain force ( you may calculate ) will be taken into consideration , but when the wedge goes back in the opposite direction ( minus of minus is +ve ...you can see in the last option, so option C is wrong ), cos of certain force will be taken into account ( so options A and B are wrong) So I am 99.99999 percent sure last option is correct. The angle of sliding is given 60 degrees . So tan 60 is root 3 and cos 60 is 1/2 ...both are there in the last option , taking the same reference fame into consideration .
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Moderation Team
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