If a walking stick with a mass of 300 g can be balanced by placing a mass M of 150 g at a distance L of 20 cm from the fulcrum, then the center of gravity of the stick is cm away from the fulcrum.

10 is the . . .

The upward force acting on the wing of a airplane in flight is known as the "lift" force. (d)

Answerthe force between the charges will be  f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes  two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges:     k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then   

It is the areas with lines. this may sound a little confusing, but i hope it !