Which statement best describes what energy transfer diagrams show? Energy can change form, but the total amount of energy stays
2 answers:
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Answer:
a = 2710m/s²
Explanation:
See attachment below.
Answer:
200 C
Explanation:
Let C1 and C2 be their charges. According to Coulomb's law
where k = is the constant, R = 0.4m is the distance between them, F = 120 N is their resulting charge force
Since their total charge is 200C:
or
We can substitute the above equation
or
So the larger charge is C = 200 C
Answer:
a) t = 3.35[s]; b) t = 1.386[s]
Explanation:
We can solve this problem by dividing it into two parts, for the first 55 [m] and then the second part with the remaining 55 [m].
We will take the initial velocity as zero, as the problem does not mention that the Rock was thrown at initial velocity.
And using kinematics equations:
Now we can calculate the time:
Now we can calculate the second time, but using as a initial velocity 32.85[m/s].
The final velocity will be:
Now we can calculate the second time:
Note: The reason the second time is shorter even though it is the same distance is that the acceleration of gravity increases the speed of the rock more and more as it falls.