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I am Lyosha [343]
3 years ago
6

Hi guys I suggest to make group to exchange the informations if they need add their name here

Physics
2 answers:
sveticcg [70]3 years ago
8 0
??


what’s the question
My name is Ann [436]3 years ago
5 0
What are you asking?
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Derive an expression for the energy needed to launch an object from the surface of Earth to a height h above the surface.Ignorin
Sergio [31]

Answer:

Explanation:

Potential energy on the surface of the earth

= - GMm/ R

Potential at height h

=  - GMm/ (R+h)

Potential difference

= GMm/ R -  GMm/ (R+h)

= GMm ( 1/R - 1/ R+h )

= GMmh / R (R +h)

This will be the energy needed  to launch an object from the surface of Earth to a height h above the surface.

Extra  energy is needed to get the same object into orbit at height h

= Kinetic energy of the orbiting object at height h

= 1/2 x potential energy at height h

= 1/2 x GMm / ( R + h)

8 0
3 years ago
Two astronauts are taking a spacewalk outside the International Space
Tems11 [23]

Answer:

im not sure

Explanation:

5 0
3 years ago
Which transformation of energy takes place when a slingshot launches a stone? (PE stands for potential energy.) A. elastic PE to
boyakko [2]

B. Elastic potential to kinetic energy

The elastic potential energy in the slingshot will be transferred to the stone as kinetic energy as the stone is launched.

6 0
3 years ago
Read 2 more answers
A steel cable with Cross Sectional Area 3.00cm² has an elastic limit of 2.40 x 10^8pascals. Find the maximum upward acceleration
bazaltina [42]

Answer:

Stress = F / A       force per unit area

A = 3.00 cm^2 = 3 E-4  m^2

F = 2.4E8 N/m^2 * 3E-4 m^2 = 7.2E4 N    max force applied

F/3 = 2.4E4 N  if force not to exceed limit   (= f)

f = M a

a = 2.4 E4 N / 1.2 E3 kg = 20 m / s^2      about 2 g

3 0
3 years ago
Whenever a net force acts on an object, there is a change in the objects ____
maw [93]

Velocity. Net force causes acceleration and acceleration causes a change in direction and/or magnitude of velocity

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3 years ago
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