Question

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

Answer 1

$F=ma\to 10-10+F_0=ma\to F_0=2\cdot2=4\ (N)$ to the right. Answer