Jack and annie push a cart to the left with forces of 3 n and 4 n, respectively. if the cart is stationary, what is the force of friction? a. 1 n to the left b. 3 n to the right c. 7 n to the right d. 7 n in the positive direction

Jack and Annie, working together, are pushing the cart to the left with 7 Newtons of force. Since it's not moving, there must be 7 Newtons of force directed to the right coming from somewhere. That's the friction. (Choice-C.)
If the forces on the cart didn't add up to zero, then the cart would be accelerating.

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4