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A man pushes a 42 kg crate uphill along a plane inclined at 30 degree with respect to the horizontal. The man pushes the crate with a constant force of 250 N along the incline and the crate moves with constant velocity. If the crate travels a distance of 4.0 m along the incline, find:
1) the work done by the man.
2) the work done by gravity
3) the total work on the crate by dissipative forces such as air resistance.
An object through a rectangular
Forces of 4 N and 6 N act on an object. What is the minimum value for the sum of these two forces
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A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 27.3 seconds after it is released, What is the ratio of the magnitude of E2 to the magnitude of E1
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