madisong57 madisong57

03-03-2016
Physics

contestada

A 49 Newton rock is lifted 2 meters in 5 seconds.
How much work is done?
What power is used?

Respuesta :

olemakpadu olemakpadu

03-03-2016

Work done is potential energy = mgh

mg = weight of the stone = 49 N

h = 5 m

Work done = (mg)h = 49 * 5 = 245 Joules.

Power = Work done / Time taken

= 245 / 5 = 49 Watts.

Answer Link

Otras preguntas

Stage theories hold that the sequence of development is ________.

briefly describe poe's requirements for the short story genre.

Fill in the blanks below with the correct reciprocal pronouns: Alex and Martha say goodbye to ------ after school. The puppies playfully bit ------ on the nose.

If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?

If an acid is splashed on your skin, wash at once with what? lab

Which statement best describes how the invention of the microscope helped shape the modern cell theory? The invention of the microscope allowed scientists to

How was the Constitution ratified, and when did it take effect?

Part of chromosome 20 breaks off and does not reattach. Which chromosomal mutation occurred? insertion deletion inversion 40 points !!

In paternalistic families, mothers assume the traditional role as breadwinners, which leads to interpersonal crimes such as domestic violence and simple assault

What part of the atp cycle are analogous to saving money?