Physics, 23.11.2019 05:31 wwwcarolynzouowficz

Ashaft is drilled from the surface to the center of the earth as in the example 12.10 (section 12.6), make the unrealistic assumption that the density of the earth is uniform. with this approximation, the gravitational force on an object with mass m, that is inside the earth at a distance r from the center, has magnitude fg=gmemr/r3e (as shown in the example 12.10) and points toward the center of the earth.
part a
derive an expression for the gravitational potential energy u(r) of the object-earth system as a function of the object's distance from the center of the earth. take the potential energy to be zero when the object is at the center of the earth.
part b
if an object is released in the shaft at the earth's surface, what speed will it have when it reaches the center of the earth?
express your answer using two significant figures.

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 05:30

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

Answers: 3

Answer

Physics, 22.06.2019 11:20

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Answers: 1

Answer

Physics, 22.06.2019 17:10

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Answers: 2

Answer

Physics, 22.06.2019 17:30

Heterogeneous mixture with larger particles that never settle is

Answers: 2

Answer

You know the right answer?

Ashaft is drilled from the surface to the center of the earth as in the example 12.10 (section 12.6)...

Questions