An organization of workers, acting collectively, seeking to promote and protect its mutual interests through collective bargaining is known as .

Union

Explanation:

Union acts as middle men between the workers and the business they work for. They are concerned with the negotiation of better needs and welfare for workers.This is usually achieved by collective bargaining.

a. formula: f=ma or f/m=a

10,000n/1,267kg≈7.9m/

b. formula: a= and s=d/t

speed= 394.6/15

s=26.3m/s

a=

a=1.75m/

c. 7.9-1.75=difference of 6.15m/

d. the force that most likely caused this difference is friction forces