A soccer ball is kicked horizontally off a bridge with a height of 36 m. The ball travels 25 m horizontally before it hits the pavement below. What was the soccer ball’s speed when it was first kicked

The originalmomentum of a pencil is distributed equally to the other half of

the pencil.

The pencil breaking into two is as a result of the internalforces acting in

opposite direction which caused the breakage.

The total momentum of a body before collision being equal to the total

momentum of the two objects after collision has occurred which is why the

pencil will have momentum distributed equally in this scenario.

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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 :

(neglecting the impulse and force of gravity)

• The net external force on the system is ZERO
• The collision and the breakage that happens is PURELY due to the internal force which are equal and opposite.
• When we consider the wall and the pencil together as a system , the net external force on the system is zero.
• We also assume that the wall is very heavy and thus it remains at rest even after the collision.
• Thus , according to the law of conservation of momentum,  the pencil must have the same momentum imparted to it initially.
• Therefore , the ORIGINAL MOMENTUM OF THE PENCIL GETS DISTRIBUTED TO THE BROKEN HALFS EQUALLY .

Answer:

8 J

Explanation:

Heat = work + change in internal energy

Q = W + ΔU

15 J = 7 J + ΔU

ΔU = 8 J

Answer:

the answer to the question is the part that is reflected by clouds and atmosphere 26%

Final answer:

If all of Earth's polar ice melts, the global sea level and average global temperature would increase, while the area covered by ice in the polar regions would decrease.

Explanation:

If all of Earth's polar ice melts, several parts of the graph would increase. One part that would increase is the global sea level. As the ice melts, the water would contribute to higher sea levels. Another part that would increase is the average global temperature. The melting ice would release more greenhouse gases, which would further contribute to global warming. Hurricanes and extreme weather events would also increase in frequency and intensity.

On the other hand, the part of the graph that would decrease is the area covered by ice in the polar regions. With the melting of the polar ice, the ice extent would significantly shrink, leading to decreased ice coverage over the Arctic and Antarctic regions.

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The kinetic energy of the object which is moving with velocity of 9 m/s and has a mass of 20 kg will be 810 joules.

What is Kinetic Energy ?

The energy possessed by the body by virtue of its motion is called kinetic energy. Mathematically -

E[K] = 1/2mv²

Given is an object that has a velocity of 9 m/s and a mass of 20 kg.

We can calculate the kinetic energy of the object by using the formula discussed above.

Mass [m] = 20 Kg

Velocity [v] = 9 m/s

Substituting the values, we get -

E[K] = 1/2 x 20 x 9 x 9

E[K] = 10 x 9 x 9

E[K] = 81 x 10

E[K] = 810 joules

Therefore, the kinetic energy of the object which is moving with velocity of 9 m/s and has a mass of 20 kg will be 810 joules.

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Explanation:

k.e =1/2m(v)²

or

k.e=m/2(v)²

so......k.e=20kg/2(9m/s)²

k.e=10kg(81m²/s²)

k.e=10kg(81m²/s²)

k.e=810kgm²/s²

HOPE ITS CORRECT

ANSWER

k.e=810kgm²/s²