6kg is equal to 60N on Earth, so 60N plus 4N is 64N.easy peasy

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6kg is equal to 60N on Earth, so 60N plus 4N is 64N.easy peasy

kg and N are different units. You can not add them.

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## Comments

Kiona, was there another symbol with the 6kg, such as m (meters) and s (seconds)? one N (Newton) = 1 kilogram times 1 meter per second squared: 1 N = 1 kg·m/s

^{2}, so if we have 6 kg·m/s^{2}, then we'd have 6 kg·m/s2 + 4 kg·m/s2 = 10 kg·m/s2, or 10 Newtons, or 10N