Answer:
30N in the direction the 45N acts.
Explanation:
Fnet = F1 + F2 (the vector sum of the forces)
Assigning a positive direction to the 45N force and a negative direction to the 15N force gives:
Fnet = 45 - 15
Fnet = 30N
Since the answer is positive, it is in the direction the 45N force acts.
Speed = distance/time
Speed = (200m)/(20s)
Speed = 10 m/s
0 - 6 is acidic
7 is neutral
8 - 14 is basic