A45.0 kg ice skater needs a 25 n horizontal force to get moving on a smooth ice surface. what is the coefficient of friction between the ice and the skates?

a.1.80

c.0.18

b.0.057

d.0.56

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?