The distance the bird flies is (17,000 + 600 + 14,400) = 32,000 km.
His average speed is (32,000 km)/(122 days) = 262.3 km/day.
The bird ends up (17,000 - 600 + 14,400) = 30,800 km north
from where he started.
His average velocity is (30,800 km)/(122 days) = 252.5 km/day north .
The runner's displacement and average velocity are both zero. (I hope this answer is on the list of choices that you neglected to share.)
Answer: Last option (total energy always remains constant)
Explanation:
The Law of Conservation basically states that energy cannot be created or destroyed. Only changed from one form to another (potential, kinetic, chemical, etc.) so it makes sense that the net energy is unchanging.
Answer:

Explanation:
Newton's second law states that the acceleration of an object is proportional to the net force exerted on it, according to the formula:

where
is the net force on the object
m is its mass
a is its acceleration
The other statements are wrong because they represent other laws of physics, namely:
When an object puts a force on another object, the second object puts a force back on the first, equal in magnitude but opposite in direction --> Newton's third law
The total energy through any process is conserved --> law of conservation of energy
Objects tend to keep their motion unless acted upon by an unbalanced outside force --> Newton's first law