How is acceleration calculated
2 answers:
Answer:
Mathematically, the acceleration of a body at any time is the second derivative of the position:
In addition, it can be obtained by deriving the speed of the body:
Explanation:
In classical mechanics acceleration is defined as the variation of speed with respect to time:
In Newtonian mechanics, for a body with constant mass, the acceleration of the body measured by an inertial observer is proportional to the force acting on it:
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The last equation gives you the tension in the string on the right:
Answer:
the correct answer is C, E’= 4E
Explanation:
In this exercise you are asked to calculate the electric field at a given point
E =
indicates that the field is E for r = 2m
E = (1)
the field is requested for a distance r = 1 m
E ’= k \frac{q}{r'^2}
E ’= k q / 1
from equation 1
4E = k q
we substitute
E’= 4E
so the correct answer is C