Question

How is a joule defined? (1 point)

• It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter.

• It is the force needed to make an object with a mass of 1 kilogram travel 1 meter.

• It is the force needed to make an object with a mass of 1 kilogram accelerate by 1 kilogram per second squared.

• It is the work done when a force of 1 newton is applied to accelerate an object by 1 kilogram per second squared.

Answers

GPT 3.5
• It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter.
A soccer player kicks a ball, applying a force of 1,000 newtons over a distance of 0.2 meter. The ball travels 50 meters down the field before another player stops the ball. How much work was done during the kick? (1 point)
• 200 joules
• 5,000 joules
• 50,000 joules
• 10 joules
GPT 3.5
To calculate work done, we use the formula:

Work (W) = Force (F) x Distance (d)

Given:
Force (F) = 1,000 newtons
Distance (d) = 0.2 meter

Work = 1,000 newtons x 0.2 meters
Work = 200 joules

Therefore, the correct answer is:
• 200 joules
A person raises a box with a weight of 50 newtons by 0.5 meter. How much work does the person do in this action? (1 point)
• 25 joules
• 0.0 joules
• 100 joules
• 0.01 joule
GPT 3.5
To calculate the work done in lifting the box, we use the formula:

Work (W) = Force (F) x Distance (d)

Given:
Force (F) = 50 newtons
Distance (d) = 0.5 meters

Work = 50 newtons x 0.5 meters
Work = 25 joules

Therefore, the correct answer is:
• 25 joules
A person gets a running start toward a wall from 5 meters away. The person pushes the wall with a force of 500 newtons, but the wall does not move. How much work is done by the person? (1 point)
• 100 joules
• 2,500 joules
• 0 joules
• 0.01 joule
GPT 3.5
When the wall does not move, no work is done by the person. In order to do work, the force applied must cause displacement. Therefore, the correct answer is:

• 0 joules

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