Physics

Problem

An asteroid falling towards a planet has a speed of

20.0 \text{ km s}^{-1}

at point P. 10 minutes later the asteroid is at point Q and its speed is

20.6 \text{ km s}^{-1}

. What is the average gravitational field strength between P and Q? A.

0.001 \text{ N kg}^{-1}

0.006 \text{ N kg}^{-1}

1 \text{ N kg}^{-1}

6 \text{ N kg}^{-1}