The force needed to make an object move in a circle is
a. centripetal force
b. weight
c. kinetic friction
d. static friction
e. none of the above
A
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Which of the following quantities is directly proportional to the time interval after a projectile has left the barrel that shot it out? The x axis is horizontal; the y axis is vertically upward.
A.
B.
C.
D.
E.