The work done in lifting a 30 kg set of bricks to a height of 20m is We all know the FORMULA IN FINDING WORK is W = F x D Where W is work; F is force; and D is distance However, let us first discuss what work really is. When there is an object being moved by a force through a certain distance, the measure of energy transfer is what we call WORK . One of the most common units used in work is JOULES (commonly used as a unit of energy). It is the work by which 1 Newton (1N = 1 kg.m/sec^2) of force is used/expended through a distance of 1 meter (1m). Refer to the problem. It is said that the 30 kg set of bricks are to be raised in a height of 20 meters. As we see, there is no force given. But recall that force (F) is the product of mass (m) of an object and its acceleration (a) F = ma However, in the formula, (g = 9.81 m/s^2) or acceleration due to gravity is used in replacement of (a) because the object is moving upward. So now we have F = mg Thus, we have the new ...
CAn you imagine living without television, phone, radio and any other tool for information and communication? Yes, and I know that I can survive. there are lots of ways to provide our survival needs it is through our environmental resources. ancient people survived without any of these technology because they use their own strategic analysis abilities to live. and without having these capabilities then its your own choice on how to survive. Besides using strategic analysis seems to be practical. We shouldnt always rely on technology that much because we will be enslaved by it. If we will be talking about technology, the things that we should always remember is that, our life doesnt revolve nor depend upon technology. Lets say yes it seems to be a life saver but if were going to compare it to the life line of the ancient people to this new peoples generation, ancient people lives longer, while we modern people... different age, ethnicity, etc. dies easily even the younger ones. I...
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