In a baseball pitching machine, two rotating wheels with radius 60cm project the ball toward the batter. For the ball's speed to be 60Km/h, at what rate should the wheel turn in revolution per second?
2007-11-19 12:39:02 · 5 answers · asked by unnamed 1 in Education & Reference ➔ Homework Help
You need to figure the circumference & divide into 60Km.
Circumference is Pi*D, so 3.1426* 120 = 377.112 cm
Speed desired is 1 Km / min or 16.66 cm/sec
Rotation is 16.66/377.112 = 0.044 rps
2007-11-19 12:55:47 · answer #1 · answered by Robert S 7 · 0⤊ 0⤋
I haven't worked it out but im throwing this out there. Would you measure the circumference of the wheels(cm)..and then convert that to Km and thats how much distance it travels in one revolution. Devide 60km by the distance in one revolution and thats how many revolutions it takes to reach 60km.devide the number of revolutions by 60 seconds and thats the revolutions per second. Hope it helps. Hope it doesn't confuse you anymore.
2007-11-19 12:53:29 · answer #2 · answered by ralj86 1 · 0⤊ 0⤋
600
2007-11-19 12:42:51 · answer #3 · answered by rumbarry 2 · 0⤊ 0⤋
im student of the week
2007-11-19 12:40:49 · answer #4 · answered by Anonymous · 0⤊ 0⤋
ask your math teacher
2007-11-19 12:43:10 · answer #5 · answered by slim 2 · 0⤊ 0⤋