An 80 kg person stands 0.75 m from the bottom of a ladder (i. e. d = 0.75 m). the ladder leans against a frictionless wall at a 60° angle. if the ladder is 50 kg and is 2.5 m long what is the friction due to the floor, in newtons, on the ladder?

the ladder in the previous problem had a person standing on it. assume this person climbs up so that he stands 2.0 m from the bottom of a ladder (i. e. d = 2.0 m). what is the force exerted by the wall, in newtons, on the ladder?

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four