Answer?!?!?
The gravitational force of Star ABC on Comet XYZ is 90n. If you triple the distance between two objects, how much gravitational force does the star exert on the comet now?!?
Please help!!
The gravitational force of Star ABC on Comet XYZ is 90n. If you triple the distance between two objects, how much gravitational force does the star exert on the comet now?!?
Please help!!
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It's the inverse square law. Force is proportional to 1/d².
E.g.
Make the distance 2 times bigger and the force gets 2² = 4 times smaller
Make the distance 3 times bigger and the force gets 3² = 9 times smaller
Make the distance 5.6 times bigger and the force gets 5.6² = 31.36 times smaller
In this problem, the distance is tripled so the force is 3² = 9 times smaller.
New force = 90/9 = 10N
E.g.
Make the distance 2 times bigger and the force gets 2² = 4 times smaller
Make the distance 3 times bigger and the force gets 3² = 9 times smaller
Make the distance 5.6 times bigger and the force gets 5.6² = 31.36 times smaller
In this problem, the distance is tripled so the force is 3² = 9 times smaller.
New force = 90/9 = 10N