A man pulls a wagon at a 15 degree angle above the horizontal using the wagon’s handle. The man applies a force of 80 N on the wagon, which has a mass of 6.5 kg. The wagon rolls at a constant speed. Find the coefficient of friction between the wagon wheels and the ground.

Aboat that travels with constant speed of 6.10 m/s in still water is to go directly across a river. the current in the river flows at 1.95 m/s. (a) at what angle must the boat be steered?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of