Answer to Question #286576 in Physics for Jawee

Question

Determine the force required to be generated by a flying saucer of mass 1.94 x 10¹⁶ µg to rise from ground level with an acceleration of 5.18 x 10⁸ Km/h upward. (b) Find the work done by this force if the saucer is elevated 196 hm from the ground. 

Answer 1

The value of acceleration is unclear, is it 5.18 x 10⁸ km/h² or km/h/s?

To solve such problems, use Newton's second law:

$$F=ma.$$

Assuming the mass is measured in micrograms, the acceleration is in km/h/s, the average force is 7.76·10¹¹ N.

Assuming the height is in hectometers, the work is

$$W=Fh=1.52·10^{16}\text{ J}.$$