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3.
A Thought Experiment: Suppose that an
object is moving in a clockwise circle (or at least
trying to move in a circle).
a. Suppose that at point A the object
traveled in a straight line at constant
speed towards B'. In what direction
must a force be applied to force the
object back towards B? Draw an arrow
on the diagram in the direction of the
required force.
B
D
C
● D
b. Repeat the above procedure for an object
moving from C to D'. In what direction must a force be applied in order for the
object to move back to point D along the path of the circle? Draw an arrow on
the diagram.
c. If the acceleration of the body is towards the center, what is the
direction of the unbalanced force? Using a complete sentence, describe
the direction of the net force that causes the body to travel in a circle at
constant speed.