The answer is B. Force=mass X accleration
Answer:
Because you need to have that momentum to decease over a little bit of time because if it doesn't have room to move backward, that force isn't going to reduce and it will hurt very badly.
The displacement covered by the worker in the whole trip is 30km.
The easiest way to solve this problem is using the displacement equation:
Δx = x₂ - x₁
A worker covers a distance of 40 km from his house to his place of
work, and 10 km towards his house back. So:
Δx = x₂ - x₁ = 40km - 10km = 30km
Power is the RATE of generating, moving, or using energy. Its unit is the WATT .