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What is A 0.25 kg stone tied to a 0.5 m string whirls at a speed of 4 m s What is the centripetal acceleration acting on the stone?
Wiki User
∙ 13y ago
Centripetal acceleration = V2/R = (4)2/(0.5) = 32 meters/sec2
The centripetal acceleration doesn't depend on the stone's mass.
(The centripetal force does.)
The centripetal acceleration doesn't "act on" the stone.
(The centripetal force does.)
The centripetal force acting on the stone is F = M A = (0.25) (32) = 8 newtons.
Wiki User
∙ 13y ago
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An athlete whirls a 6.63 kg hammer tied to the end of a 1.4 m chain in a horizontal circle. The hammer moves at the rate of 1.6 revs. What is the centripetal acceleration of the hammer?
First convert revs into radians per second to give angular frequency: omega=(1.6*360)*2pi/360= 10.05 rad s-1Then calculate the linear velocity: v=omega.r = 10.05*1.4 = 14.07ms-1Finally calculate the centripetal acceleration: a=v2/r = (14.07^2)/1.4 = 141.4 ms-2(Using the mass given, this corresponds to a centripetal force of F=ma= 6.63*141.4 = 937.5 N)
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