Which object in the list is experiencing an balanced force? (8.P.2A.2)
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2 points
A sprinter accelerating at the starting line
Athlete completing a long jump
A javelin stuck in the ground
Athlete throwing a javelin
The object that is experiencing a balanced force is the javelin stuck in the ground.
F = m A
if F = 0 (balanced) then no acceleration
Since the javelin is stuck in the ground, it is not experiencing any acceleration.
Yes
Therefore, the javelin is the object in the list that is experiencing a balanced force.
To determine which object in the list is experiencing balanced force, we need to understand what balanced force means. Balanced force refers to a situation where the forces acting on an object cancel each other out, resulting in no net force and no change in motion.
Let's analyze each object in the list to see if it is experiencing balanced force:
1. A sprinter accelerating at the starting line: In this case, the sprinter is applying a force to propel themselves forward, but there is also an equal and opposite force (friction) acting in the backward direction. Since these forces cancel each other out, the sprinter is experiencing balanced force.
2. Athlete completing a long jump: During a long jump, the athlete exerts a force on the ground to push off and gain momentum. However, there is no mention of any opposing force, so it's unclear whether this is a balanced force situation.
3. A javelin stuck in the ground: When a javelin is stuck in the ground, it is not experiencing any external force acting on it. Therefore, there are no opposing forces, and it can be considered a balanced force situation.
4. Athlete throwing a javelin: When an athlete throws a javelin, they exert a force on the javelin to launch it forward. However, there is no mention of any opposing force, so it's unclear whether this is a balanced force situation.
Based on this analysis, the objects experiencing balanced force are the sprinter accelerating at the starting line and the javelin stuck in the ground.