Question
In: Physics
During a relay race, you run the first leg of the race, a distance of 1.8...
During a relay race, you run the first leg of the race, a distance of 1.8 ✕ 102 m to the north, in 22.34 s. You then run the same distance back to the south in 24.20 s in the second leg of the race. Suppose the positive y axis points to the north. (Express your answers in vector form). (a) What is your average velocity for the first leg of the relay race? vav, y = Incorrect: Your answer is incorrect. m/s (b) What is your average velocity for the entire race? vav, y = Correct: Your answer is correct. m/s
Solutions
Expert Solution
Average velocity is defined as
(a) In first leg of the race, the total displacement was 180 m towards north. In vector notation, we can write
And total time of motion was 22.34 seconds.
Therefore, average velocity in the first leg of race was
(b) The total displacement in entire race was 0 m (As initial and final position was same).
So, average velocity in entire race is
genius_generous answered 8 months agoRelated Solutions
In a relay race, runner A is carrying the baton and has a speed of 2.60...
In a relay race, runner A is carrying the baton and has a speed
of 2.60 m/s. When he is 25.0 m behind the starting line, runner B
starts from rest and accelerates at 0.0600 m/s2. How long
afterwards will A catch up with B to pass the baton to B?
Senario: You are watching a group of children run relay races. You would like to determine...
Senario: You are watching a group of children run relay races.
You would like to determine the speed of that the children run. You
select 30 children and time them in their relay races.
e) What is the parameter for the study?
f. What is the statistic for the study?
g. Is the study an experiment or an observational study?
h. For the study, should you use a proportion or an average?
The speed of a runner increased steadily during the first three seconds of a race. Her...
The speed of a runner increased steadily during the first three
seconds of a race. Her speed at half-second intervals is given in
the table. Find lower and upper estimates for the distance that she
traveled during these three seconds.
t (s)
0
0.5
1.0
1.5
2.0
2.5
3.0
v
(ft/s)
0
6.2
10.8
14.9
18.1
19.4
20.2
Part 1 of 5
We will use either L6 or
R6 for the upper and lower estimates.
Since the runner's speed is...
The speed of a runner increased steadily during the first three seconds of a race. Her...
The speed of a runner increased steadily during the first three
seconds of a race. Her speed at half-second intervals is given in
the table. Find lower and upper estimates for the distance that she
traveled during these three seconds.
ft (smaller value)
ft (larger value)
t
(s)
0
0.5
1.0
1.5
2.0
2.5
3.0
v
(ft/s)
0
6.7
11.2
14.1
17.5
19.8
20
The speed of a runner increased steadily during the first three seconds of a race. Her...
The speed of a runner increased steadily during the first three
seconds of a race. Her speed at half-second intervals is given in
the table. Find lower and upper estimates for the distance that she
traveled during these three seconds.
t (s)
0
0.5
1.0
1.5
2.0
2.5
3.0
v
(ft/s)
0
6.2
10.8
14.9
18.1
19.4
20.2
During the first half of a 3.0 mile bike race with a friend of yours, your...
During the first half of a 3.0 mile bike race with a friend of
yours, your friend bikes the whole way at a constant speed of 23
mi/hr. You start from rest and accelerate constantly from the
beginning. You both are neck-and-neck at the half-way point of the
race. For the second half of the race, you maintain the same speed
you had at the half-way point. How much faster does your friend
need to bike in order to tie...
17) During the first half of a 2.0 mile bike race with a friend of yours,...
17) During the first half of a 2.0 mile bike race with a friend
of yours, your friend bikes the whole way at a constant speed of 22
mi/hr. You start from rest and accelerate constantly from the
beginning. You both are neck-and-neck at the half-way point of the
race. What was your acceleration rate? Answer: Not yet correct,
tries 1/35 Hint: What kind of diagram(s) might help you analyze
this question? Do you need calculus to solve this problem?...
You are quantitating benzene using isopropyl-benzene as an internal standard. During the first run, you add...
You are quantitating benzene using isopropyl-benzene as an
internal standard. During the first run, you add 100.0 microliters
of 500. microgram/mL benzene and 100.0 microliters of 500.
microgram/mL isopropylbenzene to a vial and dilute to 1.000mL to
prepare a solution that has a final concentration of 50.0
micrograms/mL of benzene and isopropylbenzene. The peak area
measured by GC-MS corresponds to 1225 and 1775, respectively.
Taking an unknown sample of a solution containing benzene with a
volume of 100.0 microliters, you...
1. The average time to run a race is 14 minutes. You wish to see if...
1. The average time to run a race is 14 minutes. You wish to see
if a new training regimen will lower the time to run the race.
After doing the training regimen you run the race 35 times and the
average time to run the race now is 13.32 minutes with a standard
deviation of 1.4 minutes. a) At the .05 level did the training
regimen lower the time (note: p value from computer is p = .003) b)...
1. The average time to run a race is 14 minutes. You wish to see if...
1. The average time to run a race is 14 minutes. You wish to see
if a new training regimen will lower the time to run the race.
After doing the training regimen you run the race 35 times and the
average time to run the race now is 13.32 minutes with a standard
deviation of 1.4 minutes.
a) At the .05 level did the training regimen lower the time
(note: p value from computer is p = .003)
b)...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Do not neglect the old for the new. The existing business must not lose priority simply...
- (10 pts) Explain why modern computers consist of multiple abstract levels and describe the main functions...
- BUOYANCY Buoyancy is the ability of an object to float. Archimede's Principle states that the buoyant...
- *For operations management statistics practice quiz-please just list the answers: 1) A production process has six...
- Why do we design airports for some capacity less than the highest capacity we can ever...
- Write a function log2(x), which gives an integer approximation of the log base 2 of a...
- A 0.025 M solution of hydroxylamine has a pH of 9.11. What is the value of...
ADVERTISEMENT