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
Marianna [84]
2 years ago
5

Kiley went 5.7 km/h north and then went 5.8 km/h west. From start to finish, she went 8.1 km/h northwest.

Physics
2 answers:
cluponka [151]2 years ago
8 0

Explanation :

Instantaneous velocity: It is defined as the velocity at a particular instant of time.

Average velocity is the ratio of total displacement covered by an object divided by the total time taken.

It is given that, Kiley went 5.7 km/h north and then went 5.8 km/h west. Here, both direction as well as magnitude of velocity is given. This implies the instantaneous speeds.

The resultant of these two velocities would be :

v=\sqrt{ (v_N)^2+(-v_w)^2

v=\sqrt{(5.8\ km/h)^2+(5.7\ km/h)^2}

v=8.1\ km/h

She went 8.1 km/h northwards. This implies resultant velocity i.e. average speed.

So, the correct option is (a).

Hence, this is the required solution.

TiliK225 [7]2 years ago
6 0
<span>5.7 km/h north and 5.8 km/h west are instantaneous velocities, while 8.1 km/h is the average velocity.

This is because each value has a magnitude and direction so it is a velocity. Moreover, the 8.1 km/h is the resultant of the two velocities so it is the average while the other two are instantaneous.</span>
You might be interested in
The vectors of a balance force are drawn...
soldi70 [24.7K]
A) same magnitude in opposite directions
5 0
3 years ago
How is friction reduced between an air hockey puck and the table?
irakobra [83]

Cause it's Corona Time

3 0
3 years ago
If you hit a bag with 40 N of force, how much force does the bag exert on your hand
Ksju [112]
40 N (Newton's third law<span> i: For every action, there is an equal and opposite reactio.)</span>
7 0
3 years ago
Coherent light with wavelength 591 nm passes through two very narrow slits, and the interference pattern is observed on a screen
kakasveta [241]

Answer:

The wavelength will be "1.182 μm".

Explanation:

The given values are:

Wavelength

\lambda=591 \ nm

or,

  =591\times 10^-9 \ m

Distance,

d = 3.00 m

n = 1

Distance of fringe from center,

y = 4.84 \ mm

We have to find the wavelength of first order dark fringe,

\lambda = ?

As we know,

⇒ y_{bright} =\frac{1\times \lambda\times L}{d}

On putting the given values in the formula, we get

   0.00484=\frac{1\times (591\times 10^{-9})\times 3}{d}          

On applying the cross multiplication, we get

   \lambda = \frac{0.00484\times 000036632}{0.5\times 3}

      =1182\times 10^{-9}

or,

      =1.182 \ \mu m    

8 0
3 years ago
It is more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant velocity. This is beca
lisabon 2012 [21]

Answer:

d. the coefficient of static friction is greater than the coefficient of kinetic friction.

Explanation:

The magnitude of the for required to be applied to the carton is given as equal to the frictional force of between the carton and the surface. So, when the carton is at rest:

F = μs*W

and when the carton is in motion:

F = μk*W

where,

F = Force Required

μs = coefficient of static friction

μk = coefficient of kinetic friction

W = Weight of Carton

Since, the weight is constant. Therefore, for the increase in the force required to move the carton at rest than the force required to keep pushing the carton in velocity, the coefficient of static friction must be greater than the coefficient of kinetic friction. Therefore, the correct option is:

<u>d. the coefficient of static friction is greater than the coefficient of kinetic friction.</u>

4 0
3 years ago
Other questions:
  • How fast must the space shuttle go to cover 20,000 meters in 4.0 seconds?
    5·1 answer
  • How do hydrothermal minerals form?
    8·1 answer
  • If 31.25
    10·2 answers
  • A 1.0-cm-diameter pipe widens to 2.0, then narrows to 0.5. Liquid flows through the first segment at a speed of 4.0. What is the
    7·1 answer
  • A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how much water does this runner
    8·1 answer
  • What is the number at the end of an isotope’s name? atomic number neutron number mass number electron number
    10·2 answers
  • Imagine a sunny day at the pool. The sun is out and you are thinking about how the light travels from the sun and then hits the
    12·2 answers
  • Please help me answer
    13·2 answers
  • Please help!!!!!! please help!!!!!! please help!!!!!!​
    11·1 answer
  • 1. Who explained the motions of the planets of the solar system at the same
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!