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
babymother [125]
2 years ago
12

Peter’s body supplies a force of 500 N to run up a 10-m hill in 10 s. How much power is involved in Peter’s run up the hill? Exp

lain and show your work. First solve for work. Then solve for power.
Physics
1 answer:
shutvik [7]2 years ago
3 0

Answer: 500 Watts

Explanation:

Power P is the speed with which work W is done. Its unit is Watts (W), being 1 W=\frac{1 Joule}{1 s}.

Power is mathematically expressed as:

P=\frac{W}{t} (1)

Where t is the time during which work W  is performed.

On the other hand, the Work W done by a Force F refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path.  It is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter (1J=(1N)(1m)=Nm  ).

When the applied force is constant and the direction of the force and the direction of the movement are parallel, the equation to calculate it is:  

W=(F)(d) (2)

In this case, we have the following data:

F=500 N

d=10 m

t=10 s

So, let's calculate the work done by Peter and then find how much power is involved:

From (2):

W=(500 N)(10 m) (3)

W=5000 J (4)

Substituting (4) in (1):

P=\frac{5000 J}{10 s} (5)

Finally:

P=500 W

You might be interested in
A certain sound is recorded by a microphone. The same microphone then detects a second sound, which is identical to the first on
olya-2409 [2.1K]

Answer:

It is perceived as louder.

Explanation:

Amplitude affects the loudness of sound.

Frequency and wavelength affect the pitch of the sound.

3 0
2 years ago
You've been tired and lethargy what are two possible reasons?
dybincka [34]

Explanation:

physical exertion.

lack of physical activity.

lack of sleep.

being overweight or obese.

periods of emotional stress.

boredom.

grief.

taking certain medications, such as antidepressants or sedatives.

5 0
3 years ago
Why is it useful to calculate average speed?
Phantasy [73]
When you are driving
4 0
3 years ago
A set is any collection of objects. true or false.
Semenov [28]
It can be, but set also means many other things.
3 0
3 years ago
The sound intensity of a certain type of food processor in normally distributed with standard deviation of 2.9 decibels. If the
Maru [420]

Answer: (48.41,\ 52.19)

Explanation:

The confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

Given : Sample size : n=9

Sample mean : \ovreline{x}=50.3\text{ decibels}

Standard deviation : \sigma=2.9\text{ decibels }

Significance level : \alpha=1-0.95=0.05

Critical value : z_{\alpha/2}=z_{0.025}=1.96

Now, the 95% confidence interval estimate of the (true, unknown) mean sound intensity of all food processors of this type :-

50.3\pm (1.96)\dfrac{2.9}{\sqrt{9}}\\\\\approx50.3\pm1.89\\\\=(50.3-1.89,\ 50.3+1.89)=(48.41,\ 52.19)

6 0
2 years ago
Other questions:
  • A ________ stream pattern develops on lands underlain by tilted or folded, alternating hard and soft, sedimentary strata.
    14·1 answer
  • What is the velocity of a rocket that goes 700 km north in 25 seconds?
    13·1 answer
  • The distance formula can be used to prove a quadrilateral has select one:
    13·2 answers
  • Table salt is blank mixed with other compunds
    6·1 answer
  • A physician has a patient that he believes has had foul play. What type of autopsy would the physician request?
    9·1 answer
  • In a Physics 111 laboratory experiment, a cart with a mass of 0.80 kg and a velocity of 0.50 m/s collides elastically into a sta
    8·1 answer
  • Car jack is machine helps people do work by?
    12·2 answers
  • Is the topic of atoms and elements a branch of physics??
    13·1 answer
  • 2 examples of where ground water comes from
    5·2 answers
  • You observe a car traveling 40 km/s southeast. you observed the cars what?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!