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aleksley [76]
3 years ago
12

In regards to mechanical energy, is energy being conserved ?

Physics
1 answer:
xxTIMURxx [149]3 years ago
7 0

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.

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Why are house keys usually made of metal rather than glass
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In figure 16-2 is the temperature of the material within the cylinder greatest during the intake stroke, compression stroke, pow
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5 0
3 years ago
A model rocket is launched straight upward with an initial speed of 56.5 m/s. It accelerates with a constant upward acceleration
marta [7]

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Maximum height reached by the rocket, h = 202.62 meters            

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It is given that,

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Distance traveled by the engine until it stops, d = 198.8 m

Let v is the speed of the rocket when the engine stops. It can be calculated using the third equation of motion as :

v=\sqrt{u^2+2ad}

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At the maximum height, v = 0 and the engine now decelerate under the action of gravity, a = -g. Let h is the maximum height reached by the rocket.

Again using third equation of motion as :

v^2-u^2=-2gh

h=\dfrac{v^2-u^2}{-2g}

h=\dfrac{u^2}{2g}

h=\dfrac{(63.02)^2}{2\times 9.8}

h = 202.62 meters

So, the maximum height reached by the rocket is 202.62 meters. Hence, this is the required solution.

3 0
3 years ago
An object has a total kinetic energy of 2,400,000 J. If it’s mass is 0.004 kg, then what is it’s velocity.
VladimirAG [237]
I dont know let me check
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3 years ago
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