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  3. 3. solve for frictional force in part a and the ne

3. Solve for frictional force in part A and the net force in Part B ....

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Physics

3. Solve for frictional force in part A andthe net force in Part B . Write your final answersfor parts A and B rounded to 3 significant digits.

a. A 2.14 kg block is sliding along a rough horizontal surface,and the only unbalanced force acting on the block is a constantfrictional force. Suppose the block is moving at speed 88.8 m/s att = 0, and after 38.9 seconds it comes to rest. Find themagnitude of the frictional force, in Newtons, between the blockand the tabletop.

b. A box of mass 40.6 g accelerates from velocity +57.2 m/s tovelocity +60.6 m/s as it moves distance 85.9 m. Find the net forceFnet, in Newtons, acting on the box.The direction of the force is given by the sign of the answer.

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