[填空题]
A 175-kg ball on the end of a string is revolving unifw bo4tqcjavej9-ij1e7,j2 o 88o q6lu ormly i0b2/o jyh+kr.z nsfq k ov37ttm xb464n a horizontal circle of radius 0.500
mbf7bx6qv+ 2oy4tsh 4.kr /z0k jotn3 m. The ball makes 2.00 revolutions in a second. (only fill in numerial value in the blanks)
(a) Determine the speed of the ball. $m/s$
(b) Determine the ball's centripetal acceleration. $m/s^2$
(c) Determine the force a person must exert on opposite end of the string. $N$
