Compare the motion of an object acted on by balanced forces with the motion of an object acted on unbalanced forces

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity