Question

A car jack allows you to lift up a heavy car. The car jack works because
A) you apply a greater force over a longer distance.
B) you apply a smaller force over a longer distance.
C) you apply a greater force over a shorter distance.
D) you apply a smaller force over a shorter distance.

Answer 1

C. When using a jack you use your strength in short bursts to lift the car.

Answer 2

The car jack works because you apply a greater force over a shorter distance.

What is efficiency of a machine?

The efficiency of a machine is the ability of a machine to perform a task with a least possible amount of effort.

When an effort is applied over a small distance to overcome a load over a larger distance, we conclude that such device is machine because it helps to perform a task faster and more efficiently.

Thus, the car jack works because you apply a greater force over a shorter distance.

Learn more about machines here: https://brainly.com/question/16968095

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