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mash [69]
3 years ago
11

3. To calculate the _____ of a moving object, divide the displacement by the time interval in which the displacement occurred.

Physics
2 answers:
Alisiya [41]3 years ago
8 0
<h3><u>Answer;</u></h3>

Average velocity

<h3><u>Explanation;</u></h3>
  • <em><u>Average Velocity of a moving body or an object is the ratio of total displacement covered to the time interval during which the displacement occurred.</u></em>
  • That is; Change in displacement divided by time.
  • The formula, therefore will be;

Average velocity = Displacement/ the time interval

  • Instantaneous Velocity on the other hand  is the velocity of an object or a body at some instance.
77julia77 [94]3 years ago
4 0

Answer:

Average velocity

Explanation:

Hi, the average velocity of an object is equal to the total displacement of an object divided by the total time spent.  

Average velocity = Distance /time  

The units used are distance units per time units (for example: meters per second).  

Is the rate of the change of position of an object.

Feel free to ask for more if needed or if you did not understand something.

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51.Shoveling snow can be extremely taxing because the arms have such a low efficiency in this activity. Suppose a person shoveli
Komok [63]

Complete question is;

Shoveling snow can be extremely taxing since the arms have such a low efficiency in this activity. Suppose a person shoveling a sidewalk metabolizes food at the rate of 800 W. (The efficiency of a person shoveling is 3%.)

(a) What is her useful power output? (b) How long will it take her to lift 3000 kg of snow 1.20 m? (This could be the amount of heavy snow on 20 m of footpath.) (c) How much waste heat transfer in kilojoules will she generate in the process?

Answer:

A) P_out = 24 W

B) t = 1470 s

C) Q = 1140.72 KJ

Explanation:

We are given;

Input Power; P_in = 800 W

Efficiency; η = 3% = 0.03

A) Formula for efficiency is;

η = P_out/P_in

Making P_out the subject, we have;

P_out = η•P_in

P_out = 0.03 × 800

P_out = 24 W

B) We know that;

Power = work done/time taken

Thus;

P_out = mgh/t

We are given;

m = 3000 kg

h = 1.20 m

Thus, time is;

t = (3000 × 9.8 × 1.2)/24

t = 1470 s

C) amount of heat wasted is calculated from;

Q = (P_in - P_out)t

Q = (800 - 24) × 1470

Q = 1,140,720 J

Q = 1140.72 KJ

3 0
2 years ago
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The answer is B.
She can measure the mass of the water, marble and the graduated cylinder with the balance.
The volume of the water can be shown on the marked graduated cylinder, the volume of the marble can be measured by the volume difference of the water before and after the marble is put in.
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Gestalt psychology is a a theory of mind of the Berlin School of experimental psychology. It tries to understand the laws of our ability to acquire and maintain meaningful perceptions in an apparently chaotic world. It proposes that the whole of an object or scene is more important than its individual parts.
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Initial height of platform is 15.87m or 16m.

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2 years ago
I was in Anchorage Alaska during the Summer Solstice. The sun rose around 3am and set around 1 am the next day-- almost 24 hours
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Answer:

Daylight hours would be shorter.

Explanation:

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