- #1

Zack K

- 166

- 6

## Homework Statement

An 85 kg tobbogan that was originally accelerating at 3.0 m/s

^{2}on frictionless snow hits a bare patch of concrete that exerts a force of friction on the sled of 180 N, what will the new acceleration be?

## Homework Equations

F=ma

## The Attempt at a Solution

Ok so this was originally a 2 part question but I merged it into one. I already calculated the applied force of the tobbogan on frictionless snow which is 255 N east. Now I have to find its acceleration when it hits the concrete. So I got the Fnet by subtracting the applied force by the force of friction. 255-180= 75 N east. So now I do a=F/m. So the acceleration by my understanding should be 75/85 which is 0.88 m/s

^{2}. But the answer sheet says that it is 0.94 m/s

^{2}.

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