Answer:
Solution is given in the attachments
Chang sees the following formula on a website about Newton’s second law. a = Sigma F over m.
2 answers:
Answer:
He needs to find the net force acting on the object in a direction.
Explanation:
The second law of motion gives the relationship between force, acceleration and mass of an object. Its mathematical expression is given by :
F represents the net force acting on the object. So, Chang needs needs to find the net force acting on the object in a direction. Hence, the correct option is (a).
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The magnitude of the total displacement is 1000 m
Explanation:
Displacement is a vector quantity connecting the initial position and final position of motion of an object.
The magnitude of the displacement is therefore the distance in a straight line between the initial and final position of motion.
The person in the problem has the following motions:
500 meters due east
866 meters due north
The two motions are perpendicular to each other, so they form the sides of a right triangle, of which the hypothenuse corresponds to the magnitude of the total displacement.
Therefore, the magnitude of the displacement can be simply found by using Pythagorean's theorem:
Learn more about distance and displacement:
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