The acceleration due to gravity is the constant of variation. what is the acceleration due to gravity of a falling object? 4.9  9.8    10.2    19.6  

Option B

Step-by-step explanation:

For a freely falling body or object the acceleration would be the acceleration due to gravity

This would vary depending on the system we choose.

If we choose m/sec ^2 i.e. metric system

acceleration due to gravity =

In FPS system

acceleration due to gravity

Out of 4 options we find that option B is right.

answer: just subtact the units and then add the non negative : happy to

step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.