ablock of mass 25 kg slides down a frictionless surface inclined at 30 degree. to ensure that the block does not accelerate, what is the smallest force that you must exert on it and what its direction??
Please help me with this and i will really appreciate it.
2007-09-26 09:39:24 · 2 answers · asked by hahahaha 2 in Science & Mathematics ➔ Physics
It would be the exact magnitude of the force of gravity parallel to the surface
25*g*sin(30)
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2007-09-26 09:43:31 · answer #1 · answered by odu83 7 · 0⤊ 0⤋
the galaxies rotate at speeds inconsistent with their obvious mass is when you consider that we do see it all. I am regarding it as being the theoretical Dark Matter. There are very robust proofs that shows that darkish subject exist. One the is the inconsistent pace of and obvious mass. darkish subject makes up approximately seventy five% to eighty% of the problem within the Universe...
2016-09-05 08:45:23 · answer #2 · answered by ? 4 · 0⤊ 0⤋