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3 years ago

Marie lifts a 5 kg mass from the floor and puts in on a table one metre high. What is the work done?

Physics

1 answer:

sergey [27]3 years ago

8 0

Answer:

The work done was 49.05 N*m.

Explanation:

The work done by a a force is given by:

$W = F*d$

We first need to calculate the force necessary to lift the box from the ground, the force needed for is the weigh of the box, which is shown below:

$F = m*g\\F = 5*9.81\\F = 49.05 \text{ N}$

Therefore the work done by lifting the box and placing it on the table is:

$W = 49.05*1 \\W = 49.05 \text{ N*m}$

The work done was 49.05 N*m.

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lukranit [14]

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3 years ago

A major contribution of Johannes Kepler to the development of modern astronomy was:________.

fgiga [73]

Answer:

<h2>The answer is planetary motion</h2>

Explanation:

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states that:

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3 years ago

"When fire stopping material is used where more than ____________________ nonmetallic sheathed cables pass through wood framing

GenaCL600 [577]

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3 years ago

The current in a wire varies with time according to the relationship 1=55A−(0.65A/s2)t2. (a) How many coulombs of charge pass a

mario62 [17]

Answer:

(A) Q = 321.1C (B) I = 42.8A

Explanation:

(a)Given I = 55A−(0.65A/s2)t²

I = dQ/dt

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To get an expression for Q we integrate with respect to t.