Basically i have no clue how to do this so I was hoping someone could help me on the formulas with some and explain/show how to set it up. Thanks :)(adsbygoogle = window.adsbygoogle || []).push({});

1. a block and tackle (a system of pulleys) with a mechanical advantage of 48 is used to life a piano 11 m to the third floor of a building. Although the pullets in the block and tackle make it easy to lift it still takes a long time because of the length of the rope. What is the length? (hint: its the input distance)

2. the whale shark is the largest of all fish and can have the pass (I believe she meant mass) of three adult elephants. Suppose that a crane is lifting a whale shark for delivery to an aquarium. The crane exerts a force of 2.5*10^{4}N to lift the shark from rest. If the shark's acceleration equals 1.25 m/s^{2}, what is the sharks mass?

3. Suppose a meteorite collides with Earth with a force of 6.41*10^{12}N.

A. What is the mass of the meteorite if it's impact speed is 10 km/s so that it has an acceleration of approximatley -1.00*10^{8}m/s^{2}

P.S. I'm not trying to take the easy way out and cheat the thing has about 50 problems so I'm just trying to get some examples because I don't understand this section of my review and I don't want to do bad on the final.

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# Homework Help: Mechanical advantage, acceleration, work, power

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