A 30 kg box has to move up an inclined plane of slope 30^(@) to the horizontal with a uniform velocity of 5 ms^(-1).If the frictional force retarding the motion is 15ON, the horizontal force required to move the box up is(g=10ms^(-2))

A 30 kg box has to move up an inclined plane of slope 30^(@) to the ho

1.	A 30 kg box has to move up an inclined plane of slope 30^(@) to the horizontal with a uniform velocity of 5 ms^(-1).If the frictional force retarding the motion is 15ON, the horizontal force required to move the box up is(g=10ms^(-2))
Answer» `300xx(2)/(sqrt3)N` `300xx(sqrt3)/(2)N` `300N` `150N` Solution :`F cos theta=mg sin theta +f, f=mu_(s)N`