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Leto [7]
3 years ago
6

When attempting to determine the coefficient of kinetic friction, why is it necessary to move the block with constant velocity

Physics
1 answer:
Readme [11.4K]3 years ago
4 0

Answer:

Explanation:

In order to measure the coefficient of friction , we apply external force to move the body . When external force comes in motion , we adjust the external force so that it moves with zero acceleration or uniform velocity . In this case external force becomes equal to kinetic frictional force and then net force becomes zero because

net force = mass x acceleration = m x 0 = 0

Now frictional force = μ mg where μ is coefficient of kinetic friction

so F = μ mg where F is external force applied

μ = F / mg

Hence , to make external force equal to frictional force , it is necessary to make acceleration of body zero .

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tia_tia [17]

Answer: Cell's nucleus

Explanation :

The full form of DNA is Deoxyribonucleic acid. The genetic information of a cell is organized in the DNA. It is inherited from parents by their children.

DNA is coiled into chromosomes in a cell's nucleus. It has a shape like a double helix. It is twisted in the form of spirals.

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6 0
3 years ago
Read 2 more answers
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Answer:

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3 years ago
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3 years ago
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Komok [63]

Answer:

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The 40X objective is use majorly to identify tissue , to observe the finer details and study tissue organization on the histology slide.

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