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Y_Kistochka [10]
3 years ago
10

Under what conditions is energy conserved

Physics
1 answer:
Alinara [238K]3 years ago
8 0

Answer:

If only internal forces are doing work (no work done by external forces), then there is no change in the total amount of mechanical energy. The total mechanical energy is said to be conserved. ... In these situations, the sum of the kinetic and potential energy is everywhere the same.

Explanation:

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Explanation:

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To understand the terms in the Doppler shift formula.
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4 years ago
Two blocks of ice, one four times as heavy as the other, are at rest on a frozen lake. A person pushes each block the same dista
ANEK [815]

Answer:

The kinetic energy of the heavier block after the push is equal to the kinetic energy of the lighter block

Explanation:

Kinetic energy of smaller object

K=(1/2)mv^2

where m= mass of smaller object and v= velocity of smaller object

Also, it is given that heavier object is four times the mass of lighter object and consider its velocity as V

kinetic energy of heavier block K '= (1/2) (4m) V^2

Now, For smaller block , v^2 - u^2=2aS

[by Newtons laws of motion]

Also, v^2 = 2(F/m)S

Where S= displacement, F= force, u= initial velocity

So, K=(1/2)m[2(F/m)]S

\Rightarrow  K = FS

For heavier block ,

V^2 - u^2 = 2a'S

or,  V^2=2(F /4m)S

So,K '= (1/2)(4m)[2(F/4m)S

\Rightarrow  K'= FS

Therefore the kinetic energy of the heavier block after the push is equal to the kinetic energy of the lighter block

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4 years ago
Haverá algum movimento de carga ao ligar duas esferas condutoras M e N de volumes diferentes, mas com a mesma cara?
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it just depends on the situation some times yes sometimes no

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Which one of the following accurately describes the force of gravity? A. The force of gravity is slightly lower at the bottom of
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