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3 years ago

If a book has a weight of 23.3 N on earth, what is its mass

Physics

1 answer:

vaieri [72.5K]3 years ago

6 0

Answer:

2.38 kg

Explanation:

by definition, weight in physics is the force of gravity (Fg)

Fg = mass x gravity or mg

gravity is 9.8 m/s^2

N = kg m/s^2

Fg = mg

23.3 kg m/s^2 = 9.8 m/s^2 x m

23.3 kg m/s^2 / 9.8 m/s^2 = m >>> m/s^2 cancel out

23.3/9.8 = 2.37755 kg

m = 2.38 kg

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3 years ago

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Answer:

Part a)

$Reading = 2.00 kg$

Part b)

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Part c)

$Reading = 4.04 kg$

Part d)

from t = 0 to t = 4.9 s

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The reading of the scale will be less than the actual mass

Explanation:

Part a)

When elevator is ascending with constant speed then we will have

$F_{net} = 0$

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$T = mg$

So it will read same as that of the mass

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Part b)

When elevator is decending with constant speed then we will have

$F_{net} = 0$

$T - mg = 0$

$T = mg$

So it will read same as that of the mass

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Part c)

When elevator is ascending with constant speed 39 m/s and acceleration 10 m/s/s then we will have

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Part d)

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from t = 0 to t = 4.9 s

so the reading of the scale will be same as that of weight of the block

Then its speed will reduce to zero in next 3.2 s

from t = 4.9 to t = 8.1 s

The reading of the scale will be less than the actual mass

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3 years ago

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Answer:

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