A 2kg cart experiences three forces a 10N pull to the left, a 10N pull to the right and then some other unknown pull. If the positive direction is to the right, and the carts accelerarion is 2m/s/s what us unknown force
"F=ma\\to 10-10+F_0=ma\\to F_0=2\\cdot2=4\\ (N)" to the right. Answer
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