Air resistance is a force that slows down objects moving through the air. ... Objects are affected by gravity the same, but air resistance can affect the speed of an object's descent. An object with more surface area will have more air resistance.
The way I see it, depending on what the number represents, the number in the decimals spot could mean something significant. hope this helps :)
15) a
16) b
17) a
Hope this helps
The momentum, p, is the product of the mass and the velocity:
p = m*v = 0.145 kg * 40 m/s = 5.8 kg*m/s
