A man weighs 840N on earth surface and 640N on another planet. Calcula

1.	A man weighs 840N on earth surface and 640N on another planet. Calculate planet's gravitational force
Answer» Hey, there! Here's your answer. Let the mass of the MAN be 'm' kg Since *mass remains unaffected from WHEREVER you are*, mass of man on EARTH = mass of man on the other planet = m kg. Weight = mass × acceleration due to GRAVITY For Earth, W = m ×g = 840 N For the other planet, W' = m × g' = 640 N ☛ Now, divide both the equations, $\frac{W}{W'} = \frac{m \times g}{m \times g'} = \frac{840}{640} \\ \\ \frac{g}{g'} = \frac{21}{16} \\ \\ g' = \frac{16}{21} g = 7.619m {s}^{ - 2} (approx.)$ Hope that helps. Thanks.

A man weighs 840N on earth surface and 640N on another planet. Calculate planet's gravitational force

Answer»

Hey, there!

Here's your answer.

Let the mass of the MAN be 'm' kg

Since mass remains unaffected from WHEREVER you are, mass of man on EARTH = mass of man on the other planet = m kg.

Weight = mass × acceleration due to GRAVITY

For Earth, W = m ×g = 840 N

For the other planet, W' = m × g' = 640 N

☛ Now, divide both the equations,

$\frac{W}{W'} = \frac{m \times g}{m \times g'} = \frac{840}{640} \\ \\ \frac{g}{g'} = \frac{21}{16} \\ \\ g' = \frac{16}{21} g = 7.619m {s}^{ - 2} (approx.)$

Hope that helps.

Thanks.

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