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3. An ohject tails trom rest through the air. lis velocily increases untiz reaches terminal velocily- Which quantly increases unta its terminal velocily is reached? A acoeleration B air resistance C resultant force D weight

Ask by Chen Hampton. in Singapore
Feb 27,2025

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Air resistance increases until terminal velocity is reached.

Solución

The correct answer is B: air resistance. Explanation: An object falling from rest accelerates due to gravity. As its speed increases, the air resistance (or drag force) acting against it also increases. When the drag force grows enough to balance the weight of the object, the net force becomes zero. At that point, the object stops accelerating and continues falling at a constant speed known as terminal velocity. Thus, the quantity that increases until terminal velocity is reached is the air resistance.

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As the object falls, its acceleration increases due to the force of gravity acting on it, but as it picks up speed, air resistance becomes more significant. The interplay between gravity and air resistance leads to the object reaching terminal velocity, where acceleration effectively becomes zero. Fun fact: terminal velocity for a human skydiver is about 53 m/s (around 120 mph) in a belly-to-earth position! Once the object reaches terminal velocity, the weight of the object is perfectly balanced by the air resistance, resulting in a net force of zero. This means that while the object continues to fall, its speed no longer increases, and it travels at a constant velocity. Just like a rollercoaster ride – thrilling at first, but eventually levels out perfectly!

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