May the Force be with You

Classical Mechanics Level 1

If Luke Skywalker has a mass of 100 kg 100\text{ kg} and stands on Earth, how much force does he apply to the Earth?

Assumptions and Details

  • Take g = 10 N/kg g=10 \text{ N/kg} .
1000 N Negligible 100 N 0 N

Rajdeep Das by rajdeep das , 20, India

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3 solutions

Rajdeep Das
Jun 27, 2016

The Earth applies a force of 100*10 = 1000 N on Luke. Thus by Newton's third law, Luke too must apply 1000 N on the Earth.

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Krishna Karthik
Nov 21, 2018

F = m a F=ma

F = 100 ∗ 10 F=100*10

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Viki Zeta
Jun 28, 2016

Weight = mass × \times gravity

So, W = 100 ∗ 10 = 1000 N W = 100 * 10 = 1000 N

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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