3 years ago

The diagram shows a ball falling toward Earth in a vacuum.

Physics

2 answers:

Sloan [31]3 years ago

8 0

Answer:

Explanation:

murzikaleks [220]3 years ago

7 0

Answer: C

Explanation: I took the quiz on A p e x

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opinion a

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the si units of distance is metre (m)

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a horizontal force of 50N acts on a body of mass 20KG initially at rest and displaces it by striking it along the entire 20m pat

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Dr. Eriksson is working on a material called selenium. She is adding a certain number and type of atoms to the selenium, which w

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Selenium is a semiconductor.

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A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Complete the following statemen

Eva8 [605]

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Keeping the speed fixed and decreasing the radius by a factor of 4

Explanation:

A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. The centripetal acceleration is given by :

$a=\dfrac{v^2}{R}$

We need to find how the "centripetal acceleration of the ball can be increased by a factor of 4"

It can be done by keeping the speed fixed and decreasing the radius by a factor of 4 such that,

R' = R/4

New centripetal acceleration will be,

$a'=\dfrac{v^2}{R'}$

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3 years ago