Two 0.62 kg basketballs, each with a radiusof 12 cm, are just touching. Ignore a

Question

Two 0.62 kg basketballs, each with a radiusof 12 cm, are just touching. Ignore any other gravitationalinteractions. (a) How muchenergy is required to change the separation between thecenters of the basketballs to 1.0 m?
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(b) How much energy is required to change the separation betweenthe centers of the basketballs to 10 m?
-------J (a) How muchenergy is required to change the separation between thecenters of the basketballs to 1.0 m?
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(b) How much energy is required to change the separation betweenthe centers of the basketballs to 10 m?
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Explanation / Answer

(a) W = Fd = mg(d-2r) = (0.62)(9.81)(1.0-0.24) = 4.622 joules (b) W = (0.62)(9.81)(10.0-0.24) = 59.36 joules

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