Chapter 4
Newton's Three Laws
Part 5

Solution 4

Part a
For part a all three forces are pointing in the same direction.

This is the sum of all the x-components of the force, (the only component in this problem). Now we put the values into Newton's Second Law

Now solve for the acceleration.

Part b
Same idea as part a except that two of the forces are negative, so the force is different.

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