Mark walked 2 miles east, then 1 mile north. how would you determine his
total displacement?
o
a. subtract 1 from 2.
o
b. draw a vector from his starting point to his ending point.
o
c. add 1 and 2
o
d. draw a vector going 3 miles northeast.
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The correct option is B i.e total displacement

Draw a vector from his starting point to his ending point.

Explanation:

Displacement:

A displacement is a vector whose length is the shortest distance from the initial to the final position of a point.

Here we will have figure below

Where

A is a initial point from where Mark walked 2 miles east till point B.

Then 1 mile to North till point C.

Therefore point C is the final point.(or end point)

Here

So his total displacement will be given by drawing a vector from his starting point to his ending point.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )