Answer:
Y -- THROUGH THE FOCAL POINT
Assume the downward direction is positive and upward direction is negative
W = weight of the object = 12 N
f = air resistance on the object = - 3 N
F = net force on the object
net force is the sum of forces acting on the object , hence the net forces is given as
net force = sum of forces
F = W + f
F = 12 + (- 3)
F = 12 - 3
F = 9 N
hence the size of net force on the object comes out to be 9 N
Answer:
P = 2.45 N
Q = 6.65 N
Explanation:
According to Newton's 2nd Law:
Unbalanced Force = ma
where,
m = mass = 7 kg
a = acceleration
In the first case when both forces P and Q act on left side:
Unbalanced Force = P + Q
a = 1.3 m/s²
Therefore,
P + Q = (7 kg)(1.3 m/s²)
P + Q = 9.1 N ------------------------- equation 1
Now, in second case when both forces have different directions:
Unbalanced Force = Greater Force - Smaller Force
Unbalanced Force = Q - P
a = 0.6 m/s²
Therefore,
Q - P = (7 kg)(0.6 m/s²)
Q - P = 4.2 N ------------------- equation 2
Adding equation 1 and equation 2, we get:
(Q + P) + (Q - P) = 9.1 N + 4.2 N
2 Q = 13.3 N
<u>Q = 6.65 N</u>
Using this value in equation 2, we get:
6.65 N - P = 4.2 N
<u>P = 2.45 N</u>
Answer:
which two statements describe how soil horizons are formed?
Explanation:
A soil horizon is a layer parallel to the soil surface whose physical, chemical and biological characteristics differ from the layers above and beneath. Horizons are defined in many cases by obvious physical features, mainly colour and texture.
This is somewhat confusing, but I'd have to go with A. Since Newton's Third Law states that every action has an equal but opposite reaction.