total cost of 5 wall watches and 3 wrist watches is ₹770 and 3 wall watches and 5 wrist watches is ₹686. then the cost of single wall watch and single wrist watch is ?
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Friction acts in the backward direction (Front wheel) Now the frictional force on the backward wheel has to be greater than the one on the forward wheel for the overall frictional force to the other.
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