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MariettaO [177]
3 years ago
8

Define second class lever​

Physics
1 answer:
Aleks04 [339]3 years ago
6 0

Answer:

Please find detailed explanation of second class levers below

Explanation:

Levers are one of the classes of machine that possesses three levels namely: first class, second class and third claas. A second class lever is the level of levers in which the load (L) is in between the pivot (F) and the effort (E).

Examples of second class levers include; wheelbarrow, a bottle opener etc. In the bottle opener for example, the bottle lid (load) is in between the pivot of the opener and the hand opening it (effort).

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speed =distance/time taken

5 m/s

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Five 2.0-ω resistors are connected as shown in the figure. what is the equivalent resistance of this combination between points
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Evaluate the expression a+b when a=23 and b=45 . Write in simplest form
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Suppose all the people of the Earth go to the North Pole and, on a signal, all jump straight up. Estimate the recoil speed of th
Makovka662 [10]

Explanation:

It is known that relation between velocity and height is as follows.

              v = \sqrt{2gh}

where,     g = acceleration due to gravity = 9.8 m/s^{2}

                h = height = 0.2 m

Therefore, velocity is calculated as follows.

            v = \sqrt{2gh}

               = \sqrt{2 \times 9.8 \times 0.2}

               = 3.92 m/s

Also,

      m_{people}v_{people} = m_{earth}v_{earth}

    v_{earth} = \frac{m_{people}v_{people}}{m_{earth}}

Putting the given values into the above formula as follows.

     v_{earth} = \frac{m_{people}v_{people}}{m_{earth}}

                = \frac{6 \times 10^{9} \times 74 kg/person}{6 \times 10^{24} kg}

                = \frac{444 \times 10^{9}}{6 \times 10^{24}}

                = 74 \times 10^{-15} m/s

or,             = 7.4 \times 10^{-14} m/s

Thus, we can conclude that recoil speed of the Earth is 7.4 \times 10^{-14} m/s.

4 0
3 years ago
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