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A resultant force with a magnitude 
and
directede to the right is applied to a girl on rollar skates.
The girl has a mass m. The force starts at 
and
continues until 
.
- (a)
-
What is the impulse J of the force?
- (b)
-
If the girl is initially at rest, what is her speed at tiem
?
Susan Margaret Shorrock
Thu Jul 10 13:52:19 EDT 1997