Posted by **Frankie** on Thursday, July 22, 2010 at 12:30pm.

(a) At a certain instant, a particle-like object is acted on by a force F = (3.0 N) - (1.0 N) + (8.0 N) while the object's velocity is v = - (2.0 m/s) + (4.0 m/s) . What is the instantaneous rate at which the force does work on the object?

W

(b) At some other time, the velocity consists of only a j component. If the force is unchanged, and the instantaneous power is -12 W, what is the velocity of the object just then?

m/s

## Answer This Question

## Related Questions

- Physics - At a certain instant, a particle-like object is acted on by a force F...
- physics - (a)At a certain instant, a particle-like object is acted on by a force...
- Physics - (a) At a certain instant, a particle-like object is acted on by a ...
- Physics/Math - At a certain instant, a particle-like object is acted on by a ...
- physics - At a certain instant, a particle-like object is acted on by a force F...
- Physics please help????? - (a) At a certain instant, a particle-like object is ...
- Physics - A 5.57-kg object passes through the origin at time t = 0 such that its...
- physics - An object falling under the pull of gravity is acted upon by a ...
- physics - An object falling under the pull of gravity is acted upon by a ...
- physics - A 8.0 kg object, moving with a constant velocity of 8.0 m/s, is acted ...

More Related Questions