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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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Consider the hydrogen atom. How does the energy difference between adjacent orbit radii change as the principal quantum number i

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A spring with spring constant of 34 N/m is stretched 0.12 m from its equilibrium position. How much work must be done to stretch

Nesterboy [21]

Answer:0.253Joules

Explanation:

First, we will calculate the force required to stretch the string. According to Hooke's law, the force applied to an elastic material or string is directly proportional to its extension.

F = ke where;

F is the force

k is spring constant = 34N/m

e is the extension = 0.12m

F = 34× 0.12 = 4.08N

To get work done,

Work is said to be done if the force applied to an object cause the body to move a distance from its initial position.

Work done = Force × Distance

Since F = 4.08m, distance = 0.062m

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