contestada

The acceleration due to gravity on some planet is 18.9 m/s2. If you weigh 1081 N on Earth, how much would you weigh on that planet?V

Respuesta :

r3t40

The acceleration is [tex]a=18.9\mathrm{\frac{m}{s^2}}[/tex] and force is [tex]F=1081\mathrm{N}[/tex].

Newtons second law of motion that when an object is accelerating its force (weight in current context) can be calculated using his mass:

[tex]F=ma[/tex]

If we express mass:

[tex]m=\frac{F}{a}[/tex]

We first need to find mass since mass won't change no matter the acceleration.

If we know that acceleration on earth equals [tex]g\approx10\mathrm{\frac{m}{s^2}}[/tex] then we can calculate our mass:

[tex]m=\frac{F}{g}=\dfrac{1081\mathrm{N}}{10\mathrm{\frac{m}{s^2}}}=108.1\mathrm{kg}[/tex]

Then we use this mass and calculate our weight on a different planet:

[tex]F=ma=108.1\mathrm{kg}\cdot18.9\mathrm{\frac{m}{s^2}}=\boxed{2043.09\mathrm{N}}[/tex]

Hope this helps.

Edit one:

Also note that I have rounded [tex]g[/tex] to [tex]10\mathrm{\frac{m}{s^2}}[/tex] if wish to get more precise results use [tex]g\approx9.81\mathrm{\frac{m}{s^2}}[/tex].

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