Question

Estimate the force a person must exert on a massless string attached to a 0.15 kg ball to make the ball revolve in horizontal circle of radius 0.6 m. The ball makes 2 revolutions per second.

Answer 1

Answer:

$F = 14.2 N$  

Explanation:

From the question we are told that:

Mass $m=0.15kg$

Radius $r=0.6$

Angular Velocity $\omega=2rev/s$

                            $\omega= =2x2 \pi rad/s=>4 \pi rad/s$

Generally the equation for Force applied is mathematically given by

 $F =mrw2$

 $F=0.15*0.6* (4*x3.14^)2$

 $F = 14.2 N$