Understanding Force and Motion in Physics
Why does a student wearing in-line skates move away from a brick 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
Answer:
Because the forces acting on the student are creating a net force
When a student wearing in-line skates pushes against a brick wall, the reason they move away from the wall is because the forces acting on the student are creating a net force. This means that the forces are unbalanced, resulting in the student moving away from the wall.
Gravity plays a role in this scenario, but the key factor is the net force that is being exerted by the student. In this case, the net force is greater than the force keeping the student in place against the wall, causing them to move away.
The friction between the skates and the pavement is also a contributing factor. If the friction was less than the force exerted by the student, they may not move away from the wall. However, in this situation, the net force overcomes the frictional force, leading to the student's movement.