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lys-0071 [83]
3 years ago
12

How long must a 400w electrical engine work in order to produce 300kj of work

Physics
1 answer:
vladimir1956 [14]3 years ago
8 0

Answer:

300000 J / 400 J/s = 750 s = 12.5 minutes

Explanation:

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Your little sister (mass 25 kg) is sitting in her little red wagon (mass 8.5 kg) at rest. You begin pulling her forward, acceler
Nata [24]

Answer:

Your little sister (mass 25.0  ) is sitting in her little red wagon (mass 8.50  at rest. You begin pulling her forward and continue accelerating her with a constant force for 2.35  at the end of which time she's moving at a speed of 1.80  .

(a) Calculate the impulse you imparted to the wagon and its passenger. (b) With what force did you pull on the wagon?

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3 years ago
The picture below shows a person swinging a toy plane attached to a string in
Elina [12.6K]

Answer:The answer is option C, the point A

Explanation:Just did it

3 0
3 years ago
A passenger walks from one side of a ferry to the other as it approaches a dock.Passenger's velocity is 1.55 m/s due north relat
victus00 [196]

Answer:\theta =33.22^{\circ}

Explanation:

Given

Velocity of Passenger w.r.t to Ferry

v_{pf}=v_p-v_f=1.55\hat{j}-------1

Velocity of Passenger w.r.t to water

v_{pw}=v_p-v_w=4.5\left ( -\hat{i}+\hat{j}\right )--------2

Subtract 2 from 1

v_f-v_w=-4.5\hat{i}+2.95\hat{j}

(b)direction

tan\theta =\frac{2.95}{4.5}=0.655

\theta =33.22^{\circ} North of west

5 0
4 years ago
A car of weight 300N moved through a distance of 10m when pushed by 3 students
Sati [7]

The work done by the three students is 3,000 J.

The energy transferred in the process is 3,000 J.

<h3>What is work done?</h3>
  • Work done is the product of force and distance moved by the object.

W = Fd

The work done by the three students is calculated as follows;

W = 300 x 10

W = 3,000 J

<h3>What is energy transfer?</h3>
  • This is means by which energy is converted from one form to another.

The energy transferred in the process is determined by work energy theorem.

E = W

E = 3,000 J

Learn more about work-energy theorem here: brainly.com/question/22236101

3 0
2 years ago
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