Omar and ahmed are lifting weights in the gym. Each lifts a weight of 200N. Omar lifts the weight to a height of 2.0m, whereas ahmed lifts it to a height of 2.1m. Who does more work in lifting the weight.

Ahmed did more work in lifting the weight than Omar.

Explanation:

Work done can be determined as the product of a force and the distance moved in the direction of the force.

Work done = F x s

In the given question, since the weight is lifted through a height, then the work done equals potential energy.

i.e Work done = Potential energy

                       = mgh

But,

Force = weight = mg

So that,

Work done = Fh

where F is the weight and h is the height.

i. Work done by Omar = Fh

                            = 200 x 2.0

                            = 400

Work done by Omar is 400 Nm.

ii. Work done by Ahmed = Fh

                                     = 200 x 2.1

                                     = 420

Work done by Ahmed is 420 Nm.

Thus, Ahmed did more work in lifting the weight than Omar.

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

hope this !