A weight would be least affected since it would fall striaght down if it was say paper it would go down slower because it has more air resistance due to less weight
N₀ = number of radioactive atoms initially present = 128
N = number of radioactive atoms left after time "t" = 2
t = time taken
T = half life period for the radioactive metal = 20 years
λ = decay constant = ?
decay constant is given as
λ = 0.693/T
inserting the values
λ = 0.693/20
λ = 0.0347
number of radioactive atoms left after time "t" is given as
N = N₀ ![e^{-\lambda t}](https://tex.z-dn.net/?f=e%5E%7B-%5Clambda%20t%7D)
inserting the values
2 = (128) ![e^{-(0.0347) t}](https://tex.z-dn.net/?f=e%5E%7B-%280.0347%29%20t%7D)
t = 120 years
Easier or more easy to follow?
Answer:
resultant force
the vector aim is the resultant force