the answer is B. hope i helped
Answer:
Mechanics is the branch of physics which deals with the motion of objects its causes and effects.
Sub branches
kinematics(deals with motion of objects without studying the cause of its motion)
dynamic(deals with the motion and cause of motion of objects)
Explanation:
When the spring is extended by 44.5 cm - 34.0 cm = 10.5 cm = 0.105 m, it exerts a restoring force with magnitude R such that the net force on the mass is
∑ F = R - mg = 0
where mg = weight of the mass = (7.00 kg) g = 68.6 N.
It follows that R = 68.6 N, and by Hooke's law, the spring constant is k such that
k (0.105 m) = 68.6 N ⇒ k = (68.6 N) / (0.105 m) ≈ 653 N/m
"you....are seriously thinking about overcoming it, but haven't yet made a commitment to take action."
so u are beyond precontemplation but not at preparation - ans is A.) Contemplation
