A student wearing in-line skates pushes against a brick wall. why does the student move away from the wall ? 1. Because the forces acting on the student are balanced

2. Because the forces acting on the student are creating a net force

3. Because gravity is less than the student's push on the wall

4. Because the friction between the skates and the pavement is greater than the student's push on the wall

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.