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December 20, 2014

December 20, 2014

Posted by **Suzy** on Monday, October 10, 2011 at 9:43am.

(a) Find the net work done on the car.

(b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.)

- College Physics -
**bobpursley**, Monday, October 10, 2011 at 9:54ama) net work equals the change in KE.

or, Vf^2=Vi^2+2ad solve for a

then work= force*distance= mass*a*distance.

b) force= ma

- College Physics -
**Kellie**, Monday, October 10, 2011 at 12:19pmI worked out the first equation for part a and found the acceleration to be -0.2304. When doing the second equation, I found work to be -8478.72 J. Can work be negative? I feel like I haven't worked this out correctly.

- College Physics -
**Kellie**, Monday, October 10, 2011 at 12:21pmI feel like the acceleration isn't correct.

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