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Nata [24]
3 years ago
11

What will have a greater weight 5 kg on earth or 20 kg on the moon?​

Physics
1 answer:
natima [27]3 years ago
7 0

The mass of 5 kg on the Earth has a greater weight than the mass of 20 kg on the moon.

Explanation:

The weight of an object is given by

W=mg

where

m is the mass of the object

g is the acceleration of gravity

On the Earth, the acceleration due to gravity is

g=9.8 m/s^2

So a mass of m = 5 kg on the Earth would weigh

W=mg=(5)(9.8)=49 N

On the moon, the acceleration due to gravity is

g=1.6 m/s^2

So a mass of m = 20 kg on the Moon would weigh

W=mg=(20)(1.6)=32 N

So, the mass of 5 kg on the Earth has a greater weight than the mass of 20 kg on the moon.

Learn more about forces and weight:

brainly.com/question/8459017

brainly.com/question/11292757

brainly.com/question/12978926

#LearnwithBrainly

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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?

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Explanation:

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A) Formula for efficiency is;

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Making P_out the subject, we have;

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B) We know that;

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t = (3000 × 9.8 × 1.2)/24

t = 1470 s

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Q = (P_in - P_out)t

Q = (800 - 24) × 1470

Q = 1,140,720 J

Q = 1140.72 KJ

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