Posted by **Jim Kirk** on Tuesday, September 28, 2010 at 5:36am.

A 9 kg object is given a displacement

∆~s = (4 m) ý + (3 m)ˆ J + (−4 m) k

along a straight line. During the displace-

ment, a constant force of

~ F = (1 N) ý + (−5 N) J + (7 N) k

acts on the object.

Find the work done by ~ F for this displace-

ment.

Answer in units of J.

Find the component of ~ F in the direction of

this displacement.

Answer in units of N.

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