Aswimmer can swim 4.00 km/h in still water. he heads south across a river that flows east at 2.00 km/h. the river is 0.500 km wide. his velocity wih respect to the ground is

In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.

In an experiment, how can i change human errors? be specific.

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight