Is the sum of kinetic and gravitational potential energy conserved in a closed system with no additional forces including gravit
1 answer:
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Answer:
True
Explanation:
As the formula for magnitude of a vector v and their components is
Since , this means the sum of them,
, is always greater or equal to
Answer:
8.6 miles
Explanation:
In order to calculate the straight-line distance between the starting point and the ending point, we need to resolve each part of the displacement into two perpendicular directions, let's say horizontal (x) and vertical (y) directions.
In the first part, Erica moves for 5.2 miles 25∘ north of east. Resolving into the two directions:
In the second part, Erica moves 5.0 miles north, so the components are
So the components of the net displacement are
And the magnitude of the net displacement is