<span>The runner is moving by uniformly accelerated motion, starting from rest (so, his initial velocity is zero). The law of motion of the runner is
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where x(t) is the distance covered after time t, and a is the acceleration of the runner. By re-arranging the formula, we get
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We know the runner has covered a distance of S=12m in t=4.0 s, and if we plug these numbers into the equation, we find the acceleration of the runner:
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Answer:
true
Explanation:
It is true that individual sports is different from team sports.
Individual sports depend upon the individual's hard work, focus,determination only he is responsible for his fate.
when we talk about team sports it is about co-ordination , team brilliance individual cannot team sport alone every one have to contribute for the team to succeed.
<u>The statements that describes energy best as follows:
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- The total amount of energy in the universe remains constant.
- Energy can be converted from one form to another.
- Energy cannot be created or destroyed.
<u>Explanation
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The Universe is a closed system of energy from where the thermodynamics first law is quoted i.e. the energy in the closed system remains constant.
The energy in the closed system can neither be created nor destroyed in the absence of external energy supply. However, it keeps on changing from one state to another. These are the absolute statements about the total energy existing in the Universe.
There are many energy forms existing in the Universe such heat, mass, vibrations etc. that consistently change their form from one to another but the total energy amount is always constant until external energy is applied to the system.
According to the quantum theory, even an electron absorbs or emits energy while jumping from one energy band to the other. There is never a case where energy can create or destroy in a closed system.
It's attached by earths gravity that keeps it the same force to stay anchored