1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Katen [24]
2 years ago
14

Ilya and Anya each can run at a speed of 7.50 mph and walk at a speed of 4.00 mph. They set off together on a route of length 5.

00 miles . Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half.
Required:
a. How long does it take Anya to cover the distance of 5.00 ?
b. Find Anya's average speed.
c. How long does it take Ilya to cover the distance?
Physics
1 answer:
r-ruslan [8.4K]2 years ago
3 0

Answer:

T_A=0.93hours

S_A=5.23mph

T_l=0.87hour

Explanation:

From the question we are told that

Run speed of Ilya and Anya S_r=7.50mph

Walk speed of Ilya and Anya S_w=4.00mph

Total distance T_d=5.00miles

Anya Walks 1/2d and runs 1/2d

ilya walks 1/2t and runs 1/2d

Generally the distance walked by Ilay k is mathematically given by

Since ilya walks 1/2t and runs 1/2t

Therefore

\frac{k}{4}=\frac{5-k}{7.5}

k=1.7miles

Therefore llay runing distance is m

m=5-1.7\\m=3.3mile

a)Generally the Time walked by Anya T_A is mathematically given by

Anya Walks 1/2d and runs 1/2d

Therefore

t=\frac{2.5}{4.}

t_1=0.6hours

t=\frac{2.5}{7.5}

t_2=0.33hours

T_A=0.6+0.33\\

T_A=0.93hours

b)Generally the average speed of Anya S_A is mathematically given as

S_A=\frac{Distance}{T_t}

S_A=\frac{5.0}{0.93}

S_A=5.23mph

Generally the time taken b y llay T_l is mathematically given by

T_l=2t

T_l=2*(\frac{1.7}{4})

T_l=0.87hour

You might be interested in
A powerful missile reaches a speed of 5 kilometers per second in 10 seconds after its launch. What is the average acceleration o
AveGali [126]

Average acceleration  =  (change in speed)  /  (time for the change)

The missile's change in speed is  (5,000 - 0)  =  5,000 m/s

Average acceleration  =  (5,000 m/s)  /  (10 sec)

                                 =      500 m/s²       (about  51 Gs)

Inconveniently, this isn't one of the choices on the list. Is there something wrong, either with the choices or with my solution ?

No. Relax. Everything is OK.

500 meters is the same thing as 0.5 kilometer.  So my answer can also be written as  0.5 km/s² .  That doesn't change anything, and it IS one of the listed choices.

The average acceleration is <em>0.5 km/sec²  (d)</em> .

4 0
2 years ago
Read 2 more answers
Which measurement is equivalent to 350 milliliters?
tensa zangetsu [6.8K]
350 milliliters equals to .35 liters
Therefore, 3.5 times 10^-1 would be the only correct answer since that is the only one that matches .35 liters
4 0
3 years ago
All stars go through a lifecycle.
Komok [63]

Mira is much bigger than the Sun.

Only very massive stars will go through a supernova stage, causing the outer layer to explode away and the core to collapse in on itself, becoming very dense.

5 0
2 years ago
Read 2 more answers
Which of the following best represents acceleration as presented on a graph?
dusya [7]
Velocity change v time                                                                                                           because ACCELERATION=CHANGE IN VELOCITY/TIME
3 0
3 years ago
Read 2 more answers
Buhrs atomic model differed from ruthofords because it explained that
Scrat [10]

Buhrs atomic model differed from ruthofords because it explained that electrons exist in specified energy levels surrounding the nucleus. This means that, Ruthoford believed that electrons can't do very much. However, Buhrs' model showed that electrons are much more powerful than anyone else believes they can be.

6 0
3 years ago
Read 2 more answers
Other questions:
  • A boy throws a ball upward with a speed v0 = 12 m/s. The wind imparts a horizontal acceleration of 0.4 m/s2 to the left. At what
    12·1 answer
  • HELP PLZ QUICK HELP PLZ QUICK HELP PLZ QUICK HELP PLZ QUICK
    7·2 answers
  • Which are true of alpha radiation?
    5·1 answer
  • A layer of ethyl alcohol (n= 1.361) is on top of the water ( n=1.333) . At what angle relative to the normal to the interface of
    5·1 answer
  • 4. Why are cells important?
    11·1 answer
  • Michael is looking for examples of energy at the park. He notices a mother pushing her child on a swing. He graphs the number of
    11·1 answer
  • 3. What are the forces present on the rope?​
    9·1 answer
  • Which vector is the sum of the vectors shown below ?
    5·1 answer
  • A flat, square surface with side length 4.35 cm is in the xy-plane at z=0.
    13·1 answer
  • How is an emission spectrum of an element generated?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!