← 06-53 Power Solution

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Showing Revision 1 created 07/19/2012 by Amara Bot.

1. Well, power is work over the change in time. How much work is done? Well, look at the rock.
2. Well, the force we exert has to balance (mg), 2 kg*10 is 20 N and the distance is 15 m.
3. And since this is parallel to this displacement or this Δx, we can just multiply them.
4. That means, if the work is equal to 20 times 15.
5. We know the time is equal to 30 secs and the calculated power, we just do work divided
6. by the change in time, 300/30, gives me a power of 10 watts.
7. Not too bad. Now, let's solve our problem.