Estimate the force a person must exert on a string attached to a 0.145 kg ball to make the ball revolve in a horizontal circle. The ball makes 2.20 revolutions per second (T = 0.455 s ). Don't ignore the weight of the ball which revolves on a string 0.500 m long.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

double the distance = divide strength by 4

this is poiselle's equation from fluid mechanic in physics. mech eng