If you are whirling a ball on a string and you suddenly cut the string, what happens?
a. The ball falls immediately to the ground.
b. The ball keeps traveling in the same circle.
c. The ball goes off in some random straight line.
d. The ball goes off in a straight line based on where it was heading when the string was cut.
e. The ball goes off in a straight line path directed radially outward from the center of the circle.
Question 2
What is centripetal force?
a. A force that seeks the center of a circle.
b. A force that seeks the edge of a circle.
c. A force that makes an object stop traveling in a circle.
d. A force that turns the pedals of a bicycle.
e. A force that keeps an object from hitting the ground.
A killer whale plays with a ball of ice, soon after a researcher had thrown a snowball at the whale.
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