Work happens when a push or a pull is exerted on an object and the object moves a distance.

Question

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1 point
True
False
A machine is a device that makes work easier. An example of a simple machine is _______
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1 point
an inclined plane
a pulley
both A & B
Use the following formula to calculate mechanical advantage. To lift a load, you apply 40.0 N of force to a lever. The lever applies 180 N of force to the load. What is the mechanical advantage of the lever?
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1 point
Captionless Image
4.5
15.0
6.2
A machine will always have less output work than the work put into it.
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1 point
True
False
When building a house, which of the following is a simple machine that a construction worker would use?
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1 point
cement
safety hat
pulley

Answer 1

1. True - Work occurs when a push or pull causes an object to move a distance.

2. both A & B - An inclined plane and a pulley are both examples of simple machines.

3. To calculate the mechanical advantage (MA), you can use the formula:
   \[ \text{MA} = \frac{\text{Force out}}{\text{Force in}} \]
   In this case:
   \[ \text{MA} = \frac{180 , \text{N}}{40 , \text{N}} = 4.5 \]

   So, the answer is 4.5.

4. True - A machine will always have less output work than the work put into it due to factors like friction.

5. pulley - A construction worker would use a pulley as a simple machine when building a house.