3 years ago

Which materials are made of one kind of atom

Physics

1 answer:

kirill115 [55]3 years ago

3 0

Elements are pure substances that are composed or made out of only 1 kind of atom.

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A(n) 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s 2 . With what force does he press against the seat

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Answer:

Force, F = 187.42 N

Explanation:

It is given that,

Mass of boy, m = 30 kg

Acceleration due to gravity, $a=9.8\ m/s^2$

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The force acting on the boy are force of gravity and the centripetal force. The net force acting on him is as follows :

$F=mg-\dfrac{mv^2}{r}$

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