A speed does not involve the element of direction.
Answer:
H=Hydrogen, PO4=Phosphate
Explanation:
Reactions are on the left side of arrow and products are on the right side of arrow.
F = ma
3900 = 300a
a = 3900÷300
a = 13m/s/s
The net force acting on the car is 3 which slows the car down.