Correct Question:-
A jack exerts a vertical force of 4.5 × 10³
newtons to raise a car 0.25 meter. How much
work is done by the jack?
Given :-
To find:-
Solution:-
we know :-
So:-
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Answer:
This is because of the static electricity which is generated in bodies due to friction. Time to time, the door knob gets touched by many people and the charge on it goes on increasing because of increasing friction. When the charge is increased much, after a considerable time, one may get a spark or a mild shock.
Atomic number is the same number as the amount of protons. Atomic mass is the sum of protons and neutrons: the two sub-atomic particles only found in the atomic nucleus. Number of neutrons is equal to atomic mass (z) - atomic number (n), so 27-13=14 neutrons
Centripetal force = 533N
radius = 0.75 m
mass = 16.4 kg
How fast is rachel moving? we are looking for v = velocity
centripetal force = (mv^2)/r
533 = ((16.4)(v^2))/.75
cross multiply
(533)(.75) = (16.4)v^2
((533)(.75))/16.4 = v^2
v^2= 24.375
take the square root
v = 4.9
Rachel is moving at 4.9 m/s