Acyclist sprints at the end of a race to clinch a victory. she has an initial velocity of 11.5 m/s and accelerates at a rate of 0.500 m/sâ² for 7.00 s. (a) what is her final velocity? (b) the cyclist continues at this velocity to the finish line. if she is 300 m from the finish line when she starts to accelerate, how much time did she save? (c) the second-place winner was 5.00 m ahead when the winner started to accelerate, but he was unable to accelerate, and traveled at 11.8 m/s until the finish line. what was the difference in finish time in seconds between the winner and runner-up? how far back was the runner-up when the winner crossed the finish line?
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Ответ:
a)
b)
c)
Explanation:
For this case we have the following data given:
represent the initial velocity
the time when we have acceleration
the acceleration
represent the distance
the velocity for the second place winner
represent the total distance
Part a
For this case we can use the following equation:
And if we replace we got:
Part b
For this case first let's calculate the time taken to end the race with the initial velocity provided , and if we replace we got:
Now we can find the distance covered whn she accelerates
Now we can calculate the distance for the final velocity:
And the time to complet this distance is:
And the total time would be then:
And we can calculate the tame saved taking the difference from the total tim and
Part c
For this case we have the velocity for the second player;
The total distanc for this case woudl be 300--5 = 295 m we can calculate the time to travel this distance at 11.8 m/s like this:
And if we find the difference between this time and the we got:
And the distance would be:
Ответ:
I dont know what activity you are talking about but i know that it can be point guard
Explanation: