What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a speed of 8.0 km/s at that height? (Neglect air resistance and the small decrease in g over that distance. )
A)34 TJ
B)34 kJ
C)34 MJ
D)34 GJ
E)34 J

Question

Quizplus · Accepted Answer

The minimum energy needed includes both the gravitational potential energy to lift the rocket to 200 km and the kinetic energy to give it a speed of 8.0 km/s. Calculating these gives approximately 34 MJ.

What Is the Minimum Energy Needed to Lift a 1