Homework Help: physics

Posted by alexa on Saturday, July 2, 2011 at 10:30pm.

On planet x, an object weighs 10.4N. On planet B where the magnitude of the free fall acceleration is 1.48g (where g=9.8 m/s^2 is the gravitational acceleration on Earth),the object weighs 24.6N. The acceleration of gravity is 9.8 m/s^2. What is the mass of the object on Earth? Answer in kg.

What is the free fall acceleration of planet x? Answer in units of m/s^2.

I tried starting this problem, but it was hard for me to figureout how to go about doing it without getting stuck.

physics - Henry, Sunday, July 3, 2011 at 7:16pm
Planet B:
m*1.48g = 24.6N,
m * (1.48*9.8) = 24.6,
m * 14.504 = 24.6,
m = 24.6 / 14.504 = 1.7kg = mass of the
object on ALL planets including earth.

The change in Wt. of an object as you go from one location to another or from planet-to-planet is caused by the
change in the force of gravity and NOT by a change in mass.

Planet X:
mg = 10.4N.
g = 10.4 / m = 10.4 / 1.7 = 6.1m/s^2.

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