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?
Sally and David are runners participating in a relay race. Sally runs at a constant speed...
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...
3, (8 points) (Like 2.88) In a relay race, runner #1 (already in motion) must hand a baton to runner #2 (who is waiting as runner #1 completes the first part of the race). Runner #1 is moving at a constant speed v 8.47 m/s. Runner #2 begins from rest, and has a constant acceleration of a: 2.97 m/s. How far away should Runner #1 be at the moment Runner #2 begins to move so that they will both be...
Constants Periodic Table Part A Mary and Sally are in a foot race (see figure (Figure 1)). 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 0.46 m/s to the finish line. What constant acceleration does Mary now...
Mary and Sally are in a foot race (see figure (Figure 1)). 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 0.49 m/s2 to the finish line. What constant acceleration does Mary now need during the remaining portion...
Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn’t really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how far...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
4. Two runners in a 100 m race start from the same place. Runner A starts as soon as the starting gun is fired and runs at a constant speed of 8.00 m/s. Runner B isn't really paying attention and starts running 2.0 s later and runs at a constant speed of 9.3 m/s. a. Draw a position vs time graph for each runner. b. Who wins the race? c. At the instant the winner crosses the finish line, how...
In a relay race, each contestant runs a distance 26.0 m while carrying an egg balanced on a spoon, turns around, and comes back to the starting point. Edith runs the first distance 26.0 m in a time t1 = 20.7 s . On the return trip she is more confident and takes only time t2 = 14.8 s . a) What is the magnitude of her average velocity for the first distance 26.0 b) What is the magnitude of...
In a relay race, each contestant runs a distance 24.0 m while carrying an egg balanced on a spoon, turns around, and comes back to the starting point. Edith runs the first distance 24.0 m in a time t1 = 19.5 s . On the return trip she is more confident and takes only time t2 = 14.7 s . A. What is the magnitude of her average velocity for the first distance 24.0 m ? B. What is the...
Near the end of a marathon race, the first two runners are separated by a distance of 45.0 m. The front runner has a velocity of 3.45 m/s, and the second a velocity of 4.20 m/s. (a) What is the velocity of the second runner relative to the first? m/s faster than the front runner. (b) If the front runner is 250 m from the finish line, who will win the race, assuming they run at constant velocity? The first...