Sam is pushing a shopping cart at the grocery store. A small child runs up behind her and gives the cart a hard shove. What is likely to happen and why? (1 point)
• The force of the child's shove will add to the force of Sam's pushing, and the kid will fall down.
• The force of the child's shove will add to the force of Sam's pushing, and the cart will move faster.
• The force of the child's shove will be subtracted from the force of Sam's pushing, and the cart will stop.
• The force of the child's shove will cause the cart to crash.