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dimaraw [331]
3 years ago
10

wich statement is true about the law of conservation of energy for an object released from a certain height above the ground​

Physics
1 answer:
aniked [119]3 years ago
5 0

Answer:

In the absence of external forces and at any point, the sum of the kinetic energy and the potential energy is always constant.

Explanation:

Conservation of energy just means that the total energy is unchanged.

Energy is made up of potential and kinetic, so if the total is unchanged, that means the sum of them is unchanged

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Answer:

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Explanation:

From the question, we are to calculate the net force acting on the car.

According to Newton's second law of motion:

F = ma

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a = v-u/t

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Get the net force:

Recall that: F = m(v-u)/t

F  = 300(30-20)/5

F = 60(30-20)

F = 60(10)

<em>F = 600N</em>

<em>Hence the net force acting on the car is 600N.</em>

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