A person carries a plank of wood long 2m with one hand pushing down on it at one end with a force F1 and the other hand holding it up with a force of F2 applied at a distance of 50 cm from the same end of the plank. The plank has a mass of 20 kg and its centre of gravity is at the middle of the plank.

What are the magnitue of F1 and F2?

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Acoyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 4.25 s later. let the x axis point due east and the y axis point due north. find the direction of the coyote's average acceleration during that time.