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Alex17521 [72]
3 years ago
5

Which of the following accurately shows how to calculate the weight of a 20kg object

Physics
2 answers:
fenix001 [56]3 years ago
8 0

Answer:

\Huge \boxed{\mathrm{20\ kg \cdot 9.8\ m/s^2}}

Explanation:

\sf Weight \ (N)= mass \ (kg) \times acceleration \ of \ gravity \ (m/s^2)

W=mg

The mass of the object is 20 kg.

The acceleration of gravity is approximately 10 m/s².

W=20 \times 10

W=200

The weight of the object is 200 N.

forsale [732]3 years ago
4 0
The answer to your question is "20kgx9.8m/s" because weight is the force an object is exerting on another object, and the formula used to calculate force is <em>Force = Mass * Acceleration</em>.
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How tall would a tower need to be if the period of a pendulum were 30. seconds
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We use the following expression

T = 2*pi *sqrt(l/g)

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3 years ago
Two cars are raised to the same elevation on service- station lifts. If one car is twice as massive as the other, how do their p
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Answer:

The potential energy of the more massive one is twice that of the other.

Explanation:

Potential energy is given by

<em>PE</em> = <em>mgh</em>

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For the less massive car, let the mass be m_1. Then its <em>PE</em> is

PE_1 = m_1gh

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PE_2 = m_2gh

But m_2 =2m_1

\therefore PE_2 = 2m_1gh = 2(m_1gh) = 2PE_1

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3 years ago
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Question 27 a motorboat takes 3 hours to travel 144km going upstream. the return trip takes 2 hours going downstream. what is th
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In this item, we let x be the rate of the boat in still water and y be the rate of the current.

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Downstream. The speed of the boat going downstream is equal to x + y because the boat goes with the current.
                (x + y)(2) = 144

The system of linear equations we can use to solve for x is,
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We use either elimination or substitution.
 
We solve for the y of the first equation in terms of x,
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Substitute this to the second equation,
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<em>ANSWER: 60 km/h</em>
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3 years ago
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