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

How did nationalism affect ethnically diverse empires in central and Eastern Europe?

What is the probability that a test correctly rejects a false null hypothesis called?.

If you want Points (For Free Pls Be Quick)

Which federal program resulted in the construction of 650,000 miles of roads, 800 airports, and 75,000 bridges?

What additional water-related problem, beyond lead contamination, did flint suffer, according to the documentary?.

In his opinion column, which sports owner does bill sutton praise for his "art of ownership" in operating the organization and influencing the community year-ro

The expression 10s+5m represent a students score on a social studies test,where s= the number of correct short answer items and m= the number of correct multipl

The blank______ is best suited for decisions on relatively small, minor projects, while blank______ is more appropriate for large, complex projects.

Sprains frequently occur in the ________, while strains are common in the ________ area. a) wrist; knee b) elbow; hamstring c) knee; back d) wrist; back

A student claims that she can determine the height of an artificial tree in the back of her teacher's classroom by dropping a metal ball from the top of the tre