Acrane with output power of 200w lift a 600n object a vertical distance of 4 meters in how many seconds

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

Can you receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands? a. no b. yes explain