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 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 interact with them. Let’s break down each one.
1. Kinetic friction:
- Kinetic friction is the force that opposes the motion between two objects that are in contact and sliding past each other. In this case, as the player slides on the ground, the ground exerts a frictional force that opposes the player’s motion. This force slows the player down and is an essential factor in bringing them to a stop.
2. Weight:
- The weight of the player is the force due to gravity pulling them downward. This force is always acting on an object with mass and is equal to the mass of the object multiplied by the acceleration due to gravity (approximately (9.8 \, m/s^2) on Earth). In this situation, the player’s weight acts vertically downward toward the center of the Earth.
3. Normal force:
- The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, as the player slides into the base, the ground pushes up on the player with a normal force that counteracts the force of gravity. This force acts perpendicular to the surface of contact (the ground) and prevents the player from falling through it.
Not applicable:
– Thrust:
- Thrust is typically associated with propulsion, like in rockets or engines. It’s not a force involved in sliding into second base.
– Static friction:
- Static friction is the frictional force that resists the initiation of motion. Since the player is already sliding, static friction doesn’t come into play here. Only kinetic friction is relevant.
– Tension:
- Tension is a force transmitted through a string, rope, or similar object, typically in cases like pulling or lifting. It does not apply in this scenario.
Thus, the forces that apply to the player are kinetic friction, weight, and normal force.