Sally and David are runners participating in a relay race. Sally runs at a constant speed...
Sally and David are runners participating in a relay race. Sally runs at a constant speed of 2.0 m/s. When she is 1.8 m behind David, he starts from rest and begins to run in the same direction as Sally with a constant acceleration of 0.5 m/s^2. When Sally reaches him, she hands him the baton.
a) (20 points) How far has David run when he gets the baton?
b) (5 points) What is David’s speed at the moment he gets the baton?
the baton?
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Sally and David are runners participating in a relay race. Sally
runs at a constant speed...
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4. Two runners in a 100 m race start from the same place. Runner A starts...
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Mary and Sally are in a foot race (see figure (Figure 1)). When Mary is 22...
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Mary and Sally are in a foot race (see the figure). When Mary is
22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m
behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an
easy win and so, during the remaining portion of the race,
decelerates at a constant rate of 0.36 m/s2 to the finish line.
What constant acceleration does Mary now need during the
remaining portion of...
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