# Physics Kinetic Energy Question

• Feb 4th 2014, 03:41 PM
sakonpure6
Physics Kinetic Energy Question
Quote:

The shuttle craft Galileo from the USS Enterprise encounters a Class M planet. Cmdr. Data decides to orbit the plant 100. m above the surface with a speed of 8.00 x 103 m/s. If the mass of the shuttle-craft is 1.00 x 105 kg.
a) Calculate the gravitational potential energy of the shuttle craft. (Text book answer: 9.8 x 107 J)
b) Calculate the bulk kinetic energy of the shuttle craft. (Text book answer: 1.6 x 108 J)
c) calculate the total mechanical energy of the system. (Text book answer: 2.6 x 108 J)
For part:
a) I got the same answe using the equation Eg = mgh = 1.00 x 105 kg * 9.8 m/s2 *100.m = 9.8 x 107 J
b) I tried the using the equation Ek = 0.5mv2 and I got an answer of 3.20 x 1012 J
c) I do not know what to do.

• Feb 4th 2014, 04:38 PM
romsek
Re: Physics Kinetic Energy Question
Quote:

Originally Posted by sakonpure6
For part:
a) I got the same answe using the equation Eg = mgh = 1.00 x 105 kg * 9.8 m/s2 *100.m = 9.8 x 107 J
b) I tried the using the equation Ek = 0.5mv2 and I got an answer of 3.20 x 1012 J
c) I do not know what to do.