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 sliding into second base are:
- Kinetic friction
- Weight
- Normal force
Explanation:
When a baseball player slides into second base, several forces act upon them. These forces are crucial to understanding the player’s motion during the slide.
- Kinetic friction: This is the force that resists the relative motion between the player and the ground. Since the player is sliding, there is friction between their body (especially their clothing and the surface of the field) and the ground. This friction opposes the player’s sliding motion and slows them down. The force of kinetic friction is directly proportional to the normal force between the player and the surface and is the main force responsible for decelerating the player.
- Weight: The force of gravity pulls the player downward toward the ground. This force is commonly referred to as the player’s weight and acts vertically downward with a magnitude equal to the player’s mass multiplied by the acceleration due to gravity (W = mg).
- Normal force: The ground exerts a normal force on the player that acts perpendicular to the surface of contact. The normal force counteracts the player’s weight and prevents them from falling through the ground. The magnitude of the normal force is equal to the player’s weight in this scenario, assuming the player is sliding horizontally and not accelerating vertically.
Other forces that do not apply:
- Thrust: Thrust is a force typically associated with propulsion, such as when a jet engine or rocket accelerates an object. It is not relevant to a player sliding into a base.
- Static friction: Static friction acts when two objects are not moving relative to each other, such as when a player is standing still. Since the player is sliding, the friction here is kinetic, not static.
- Tension: Tension occurs in objects like ropes or cables when they are pulled. In this case, the player is not interacting with a rope or cable, so tension is not relevant.
In summary, the forces acting on the baseball player are kinetic friction, weight, and normal force.