How much force would it take to push another, larger friend on the same swing as in ques. 4 who has a mass of 70 kg to accelerate at the same rate of 4 m/s 2.

Atoms seldom exist as independent particles in nature a) as single particles, most atoms have low potential energy b) their electronegativity is much lower when they combine with other atoms c) atoms are more stable when they combine with other atoms d) neutral particles are rare