(a) At a certain instant, a particlelike object is acted on by a force F=(2.9N)i(1.7N)j+(5.7N)k while the object's velocity is v= (3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity consists of only a y component. If the force is unchanged, and the instantaneous power is 6.0 W, what is the velocity of the object just then? (Give your answer without a unit vector.)
The answer to the first part is 16.4 W. I got 1.875, rounded it to 1.88 then to 1.87, and it still won't accept my answer. I only have 1 attempt to left. Please help. My online assignment is really conscientious about sig figs.
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1 answer

2.9*3.2 +5.7*4.6 = 16.4 W yes
1.7 * v = 6
v = 3.53 m/s 👍
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answered by Damon
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