Simple Machines Test A

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Remember to enjoy the weekend!

Choose A to get this question correct.

Choose B to get this question wrong.

The given answer suggests that choosing option A will result in getting the question correct. This implies that option B would lead to an incorrect answer. The explanation provided is straightforward and does not require any additional information.

Explanation

The given answer suggests that choosing option A will result in getting the question correct. This implies that option B would lead to an incorrect answer. The explanation provided is straightforward and does not require any additional information.

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Please answer this question on a separate sheet of paper. You may include drawings.
For the multiple choice part, in order for the girl to lift the man, the effort arm of the lever should be:

The same length

Shorter

Longer

In order for the girl to lift the man using a lever, the effort arm of the lever should be longer. A lever is a simple machine that consists of a rigid bar that rotates around a fixed point called a fulcrum. The effort arm is the distance between the fulcrum and the point where the effort is applied. By increasing the length of the effort arm, the girl can exert a greater force on the lever, allowing her to lift the man. This is because a longer effort arm increases the leverage and mechanical advantage of the lever, making it easier to overcome the weight of the man.

Explanation

In order for the girl to lift the man using a lever, the effort arm of the lever should be longer. A lever is a simple machine that consists of a rigid bar that rotates around a fixed point called a fulcrum. The effort arm is the distance between the fulcrum and the point where the effort is applied. By increasing the length of the effort arm, the girl can exert a greater force on the lever, allowing her to lift the man. This is because a longer effort arm increases the leverage and mechanical advantage of the lever, making it easier to overcome the weight of the man.

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You do not need to explain the answer to this question. However, you do need to choose the best answer below.

Yes, Atlas was doing work

No, Atlas was not doing work

The given answer states that Atlas was not doing work. This means that Atlas was not engaged in any productive activity or task at the time in question.

Explanation

The given answer states that Atlas was not doing work. This means that Atlas was not engaged in any productive activity or task at the time in question.

21. Gear Ratio = effort gear divided by load gear

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The given statement explains the concept of gear ratio, which is calculated by dividing the number of teeth on the effort gear by the number of teeth on the load gear. This ratio determines the mechanical advantage of a gear system, indicating how much the input force is multiplied or reduced by the gear system. Therefore, the correct answer is A.

Explanation

The given statement explains the concept of gear ratio, which is calculated by dividing the number of teeth on the effort gear by the number of teeth on the load gear. This ratio determines the mechanical advantage of a gear system, indicating how much the input force is multiplied or reduced by the gear system. Therefore, the correct answer is A.

22.

Please choose all the ways a machine makes work easier from below.

Changes direction of force

Multiplies effort force

Increases speed of force

All of the above

All of the options mentioned in the question (changes direction of force, multiplies effort force, and increases speed of force) are ways in which a machine can make work easier. By changing the direction of force, a machine can allow us to apply force in a more convenient or efficient direction. By multiplying the effort force, a machine can help us exert a greater force than we would be able to do without it. And by increasing the speed of force, a machine can help us complete tasks more quickly. Therefore, all of these ways contribute to making work easier when using a machine.

Explanation

All of the options mentioned in the question (changes direction of force, multiplies effort force, and increases speed of force) are ways in which a machine can make work easier. By changing the direction of force, a machine can allow us to apply force in a more convenient or efficient direction. By multiplying the effort force, a machine can help us exert a greater force than we would be able to do without it. And by increasing the speed of force, a machine can help us complete tasks more quickly. Therefore, all of these ways contribute to making work easier when using a machine.