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murzikaleks [220]
3 years ago
6

A rock has a mass of 8.0 kilograms falls 5 meters.

Physics
1 answer:
Liono4ka [1.6K]3 years ago
3 0

Answer:

A. 392J

B. 392J

C. 9.899m/s

Explanation:

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Calculate the force at sea level that a boy of mass 50 kg exerts on a chair in which he is sitting.
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As per the question the mass of the boy is 50 kg.

The boy sits on a chair.

We are asked to calculate the force exerted by the boy on the chair at sea level.

The force exerted by boy on the chair while sitting on it is nothing else except the force of gravity of earth i.e the weight of the body .The direction of that force is vertically downward.

At sea level the acceleration due to gravity g = 9.8 m/s^2

Hence the weight of the boy w = mg  [m is the mass of the body]

we have m = 50 kg.

                             Hence w = 50 kg ×9.8 m/s^2

                                             =490 N kg m/s^2

                                              = 490 N

Here newton [N] is the unit of force.





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3 years ago
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Anxious to the point that he couldn't eat very well without his stomach feeling queasy. As a result of his stress, Jonah increased his time of practicing basketball and asked an old team member to help him develop new skills he needed in order to make the team. After hearing that he made the basketball team a day after tryouts, Jonah went out for a large pizza with the rest of the team players.

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[No Value Inputted Into Question]
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