course PHY 121
A steel ball of mass 110 grams moves with a speed of 30 cm / second around a circle of radius 20 cm. •What are the magnitude and direction of the centripetal acceleration of the ball?
110g * 30cm/s= 3300g cm/s
It will keep going in a circle
###This should be a=30cm/s^2 / 20cm =45cm/s^2 and it is going toward the center of the circle.
answer/question/discussion:
• What is the magnitude and direction of the centripetal force required to keep it moving around this circle?
3300g cm/s / 20cm=165g cm/s
###This should be .110kg * .45m/s^2=49.5kg * m/s^2=49.5N
This indicates moving toward the center
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