A baseball player is sliding into second base. Identify the forces on the baseball player. Check all that apply.
Thrust
Kinetic friction
Static friction
Tension
Weight
Normal force
The correct answer and explanation is :
The correct forces acting on the baseball player as they slide into second base are:
- Kinetic friction
- Weight
- Normal force
Explanation:
When a baseball player slides into second base, various forces are acting on them. Here’s a breakdown of each force:
- Kinetic Friction:
Kinetic friction is the frictional force that resists the motion of two objects sliding past each other. In this case, as the player slides along the ground, there is friction between the player’s body (especially their clothes and skin) and the surface of the field. This friction opposes the player’s motion and causes them to gradually slow down. - Weight:
Weight is the gravitational force exerted on the player by the Earth. It acts downward toward the center of the Earth. The player’s mass is multiplied by the acceleration due to gravity to determine their weight (force). This force is always present, regardless of the player’s motion. - Normal Force:
The normal force is the upward force exerted by the ground on the player. It acts perpendicular to the surface of contact. In this case, the ground pushes upward against the player to balance their weight, preventing them from falling through the surface. The normal force typically balances the weight when the player is on a flat surface.
Forces Not Present:
- Thrust: This is a force used to propel an object, typically associated with engines (like in rockets or cars). It is not applicable to the sliding motion of the player, as their motion is caused by their initial speed and kinetic friction.
- Static Friction: Static friction occurs when there is no relative motion between the surfaces. Since the player is sliding, static friction does not come into play; instead, kinetic friction is involved.
- Tension: Tension is the force transmitted through a string, rope, or cable. There is no rope or similar object creating tension in this scenario.
Therefore, the relevant forces are kinetic friction, weight, and normal force.