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4 years ago

10

a 70 kg desk sits on the floor motionless If gravity is pulling it with an acceleration of 9.8 m/s/s how much force is gravity e

xercising on the desk

1 answer:

adell [148]4 years ago

3 0

Since force is mass*acceleration,

F = 70kg * 9.8 m/s

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According to the big bang theory, the universe was once a very and hostile place.

brilliants [131]

According to the big bang theory, the universe was once a very C. hot and hostile place, and it expanded rapidly. This rapid expansion was the very reason it eventually cooled down and eventually got to its present state where all the planets and galaxies and what not were created.

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3 years ago

What is the % error in using g = 10.0 m/s^2? (Take the value ofg as 9.8 m/s^2)

Alenkasestr [34]

Answer:

So percentage error will be 2 %

Explanation:

We have given initial value of acceleration due to gravity $g=10m/sec^2$

And final value of acceleration due to gravity $g=9.8m/sec^2$

We have to find the percentage error

We know that percentage error is given by $percentage\ error=\frac{initial\ value-final\ value}{initial\ value}\times 100$

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4 years ago

Lesechka [4]

Answer:

W'=125.44 N

Explanation:

The weight of a person on the surface of Earth is 784 N

Weight is given by :

W = mg

m is mass of the person and g is acceleration due to gravity on the surface of Earth (10 m/s²)

$m=\dfrac{W}{g}\\\\m=\dfrac{784}{10}\\\\m=78.4\ kg$

The acceleration due to gravity on the surface of Moon, g' = 1.6 m/s²

Weight of the person on the moon is :

W'=mg'

$W'=78.4\ kg\times 1.6\ m/s^2\\\\W'=125.44\ N$

Hence, the person would weigh 125.44 N on the Moon.

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3 years ago

After your patched the roof, you dropped the hammer off the house and you heard it land on your toolbox on the ground 3.3s later

Schach [20]

Answer:

53.36 m.

Explanation:

Initial velocity of the toolbox u = 0

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time t = 3.3 s

height of roof h = ?

h = ut + 1/2 g t²

= 0 + .5 x 9.8 x 3.3²

= 53.36 m.

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4 years ago

Which of the following is the correctly abbreviated SI unit describing the mass of an object

frosja888 [35]

Mass is Kg
Mol is the amount of substance
m is for meters

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3 years ago

Read 2 more answers