Randy Peusch Last Lectur V Assignment-10-Gravity x CSecure https//www.webassign.
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Randy Peusch Last Lectur V Assignment-10-Gravity x CSecure https//www.webassign.net/web/Student/Assignment st?dep 18913513 04 eBook 4. 1/2 points | Previous Answers OSUniPhys1 13.3.P.032. My Notes Ask Your Teach (a) Evaluate the gravitational potential energy (in J) between two 2.00 kg spherical steel balls separated by a center-to-center distance of 25.0 cm. 1.067e-9 (b) Assuming that they are both initially at rest relative to each other in deep space, use conservation of energy to find how fast (in m/s) will they each be traveling upon impact. Each sphere has a radius of 5.40 cm 3.750-5 m/s Additional Materials eBook 5. -/3 points 51 13.3.P.034. My Notes Ask Your Teach An average-sized asteroid located 3.0 × 107 km from the center of Earth with mass 3.0 x 1013 kg is detected headed directly toward Earth with speed of 8.0 km/s. (You may ignore the size of the asteroid.) (a) What will be the kinetic energy (in J) of the asteroid just before it hits Earth? O Type here to search 3:41 PM 7/23/2018Explanation / Answer
(A) PE = - G M M / r^2
PE = - (6.67 x 10^-11)(2)(2) / (0.25^2)
PE = - 4.27 x 10^-9 J
(B) PEf =- (6.67 x 10^-11)(2)(2) / (0.054 + 0.054)^2
PEf = - 2.287 x 10^-8 J
Applying energy conservation,
PEi + KEi = PEf + KEf
(-4.27 x 10^-9) + (0) = (-2.287 x 10^-8) + 2(2 v^2 / 2)
v = 9.64 x 10^5 m/s .....Ans
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