Answer:
ORIGINAL MOMENTUM OF THE PENCIL GETS DISTRIBUTED TO THE BROKEN HALFS EQUALLY .
Explanation:
GENERALLY :
- For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.
- The above statement tells us that the total momentum of a collection of objects (a system) is conserved - that is, the total amount of momentum is a constant or unchanging value.
- Since the forces between the two objects are equal in magnitude and opposite in direction, and since the times for which these forces act are equal in magnitude, it follows that the impulses experienced by the two objects are also equal in magnitude and opposite in direction.
IN THIS CASE :
<em>(neglecting the impulse and force of gravity)</em>
- <em>The net external force on the system is ZERO</em>
- <em>The collision and the breakage that happens is PURELY due to the internal force which are equal and opposite.</em>
- <em>When we consider the wall and the pencil together as a system , the net external force on the system is zero. </em>
- <em>We also assume that the wall is very heavy and thus it remains at rest even after the collision. </em>
- <em>Thus , according to the law of conservation of momentum, the pencil must have the same momentum imparted to it initially.</em>
- Therefore , the ORIGINAL MOMENTUM OF THE PENCIL GETS DISTRIBUTED TO THE BROKEN HALFS EQUALLY .
Answer:
Power = Force x Velocity
Explanation:
Mathematically, it is computed using the following equation. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second.
If you stay on the same planet and drop a lot of objects one at a time,
it turns out that every object you drop falls from your hand to the ground
with the same acceleration, and hits the ground with the same speed,
no matter whether the object is light, heavy, or anything in between.
That particular value of acceleration is the "acceleration due to gravity".
On Earth, it's 9.81 meters per second². On the moon, it's 1.62 meters
per second². On Jupiter, it's 25.89 meters per second².
Why we don't generally notice it: The previous description is true if the
ONLY force on the object is the force of gravity. If it has to fall through
<u>air</u> on the way down, then the air can have a great effect on it. Many
museums have an exhibit where they drop things in a long tube with
all the air removed from it, and there you can see some pretty weird
stuff ... like a bowling ball, a rock, a sheet of paper, and a feather, all
falling together, with nothing fluttering.
<u>Why</u> everything falls with the same acceleration ? That's a separate question.