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
Misha Larkins [42]
1 year ago
5

A skateboarder initially has 5 kJ of kinetic energy. As she freewheels along a flat section of path, she does 400 J of work agai

nst friction and air resistance. Calculate her final kinetic energy.​
Physics
1 answer:
sweet [91]1 year ago
4 0

The final kinetic energy of the skateboarder after she freewheels and did work against friction on the flat section of the path is 4,600 J.

<h3>Conservation of energy</h3>

The final kinetic energy of the stakeboarder is determined by applying the principle of conservation of energy as shown below;

ΔK.E = -W

K.Ef - K.Ei = -W

where;

  • K.Ef is the final kinetic energy
  • K.Ei is the initial kinetic energy
  • W is work done

K.Ef = K.Ei - W

K.Ef = 5,000 J - 400 J

K.Ef = 4,600 J

Thus, the final kinetic energy of the skateboarder is 4,600 J.

Learn more about kinetic energy here: brainly.com/question/25959744

You might be interested in
The wind blows because of____.
seraphim [82]
The wind blows because of____.a. Low pressure and high pressure

b. Convection in together atmosphere.

c. Uneven hearing by the sun
*uneven 'hearing' is not a real thing. However there is an uneven 'heating' of the sun

d. All of the above

Answer:
If C is a typo, the answer is D.all of the above.
3 0
3 years ago
Read 2 more answers
What are two ways to increase impulse?
Pepsi [2]

Answer:

increase the time the force acts or you could increase the number of temptations.

hope this helped!

5 0
3 years ago
Which statements about electric field lines are correct? Check all that apply.
slava [35]

Answer:

they cross over one another between charge.

7 0
3 years ago
Eve makes a simple series circuit using a battery and two light bulbs. Through how many paths will the current be able to travel
lbvjy [14]

Answer:

Explanation:

3 I'm not sure u have insta

8 0
3 years ago
Read 2 more answers
Two identical loudspeakers are driven in phase by a common oscillator at 750 Hz and face each other at a distance of 1.24 m. Loc
Juli2301 [7.4K]

Answer:

0.2286  m,  0.686 m and  1,143 m

therefore we see that there is respect even where the intensity is minimal

Explanation:

Destructive interference to the two speakers is described by the expression

       Δr = (2n +1) λ/2

where r is the distance,  λ the wavelength and n an integer indicating the order of the interference

let's locate the origin on the left speaker

let's find the wavelength with the equation

        v =  λ f

         λ = v / f

we substitute

      Δr = (2n + 1) v / 2f

let's calculate for difference values ​​of n

     Δr = (2n +1) 343/(2 750)

     Δr = (2n + 1) 0.2286

we locate the different values ​​for a minimum of interim

    n     Δr (m)

     0    0.2286

     1     0.686

     2    1,143

therefore we see that there is respect even where the intensity is minimal

6 0
2 years ago
Other questions:
  • How are the electric field lines around a positive charge affected when a second positive charge is near it?
    14·1 answer
  • What is another term means balance in physics?
    15·2 answers
  • Lighting from the sun travels through space to earths atmosphere.
    9·1 answer
  • Two groups wanted to determine which size of parachute, when released, fell to the ground the slowest. Each group's design and r
    8·1 answer
  • Which of the following effects is produced by the high surface tension of water? Which of the following effects is produced by t
    14·1 answer
  • Any clue for this question?
    6·1 answer
  • What causes an electromagnet to create a magnetic field?
    15·1 answer
  • PLEASE HELP ASAP!! DUE IN AN HOUR :’))!!
    14·1 answer
  • Developing a Claim
    6·1 answer
  • a block of mass 5 kg is being pulled along a board horizontally with a constant velocity; the coefficient of friction between th
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!