Welcome to the article You hold a pen up in the air and then let go of it The pen s inertia is its tendency to maintain a constant. On this page, you will learn the essential and logical steps to better understand the topic being discussed. We hope the information provided helps you gain valuable insights and is easy to follow. Let’s begin the discussion!
Answer :
Explanation:
The gravity gives the pen a constant force pointing to the center of the earth. And because of Newton's Second law: The acceleration of an object is directly proportional to the force it receives, inversely proportional to its mass, and the direction of acceleration is the same as the direction of the force.
So the pen has a tendency to going straight down on the ground. I don't think it maintain a constant speed but a constant acceleration. And the rate of the acceleration is approximate 9. 8m/s^2.
And as for its inertia, Newton's original statement in Principia mathematica was that any body should remain in uniform motion in a straight line or at rest until an external force forces it to change its motion. Bodies are too lazy to move if you don't force them. The moment you let go of the pen, the initial speed is zero. And it gains a acceleration of 9. 8m/s^2
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Rewritten by : Brahmana
According Newton's law of inertia, the pen tends to continue in its state of motion or rest. Hence, the pen tends to move in a constant velocity.
What is inertia ?
Newton's first law of motion states that, every objects tends to continue on the state of motion or rest until an external force acts on it. This tendency of objects is called inertia.
We can experience inertia in many situations. A very common example is ,when a stationary bus move backward when it started quickly that it tends to stay on rest. Similarly we will move forward when the bus suddenly breaks.
The similar effect is encountered in the pen here. When it moves through the air, except the air resistance no other force to resist its motion and it tends to move in a constant speed.
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