Answer:
a=8.06m/s^2
Explanation:
The box can be considered negligible body slidding down along a curved path defined by the parabola Y=Ax^2
Note:
When it's at A(x=2m, y=1.6m),
the speed Vb=8m/s and the increase in speed=4m/s^2
To find the acceleration,
Y=Ax^2
dy/dx=8x
d^2y/dx^2=8
p={[1+(dy/dx)^2]^3/2}/|d^2y/dx^2| .......1
substituting into 1, we have
p=8.39624m
an=v^2/p
an=8^2/8.39624=7.6224m/s^2
a=sqrt(at^2+an^2)
a=sqrt(4^2+7.62246^2)
a=8.06m/s^2
ANSWER
The correct answer is D.
EXPLANATION
The y-component of the vector, is the same as the vertical component of the vector.
We can see from the graph that each box in the grid is one unit.
The component of vector a is
We count 4 boxes along the positive y- axis to get the y-component of vector a.
See graph in attachment.
The charge on each the balloon is 100nC or 1.2 × 10^-7 C
Consider two balloons of diameter 0.200m each with a mass of 1.00g hanging apart with 0.0500m separation on the ends of string making angles of 10.0° with the vertical.
The charge on each balloon can be found from
or 100nC
An electric charge is the property of matter where it has more or fewer electrons than protons in its atoms. Electrons carry a negative charge and protons carry a positive charge. The matter is positively charged if it contains more protons than electrons and negatively charged if it contains more electrons than protons.
Learn more about the charge here:
brainly.com/question/14713274
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Length-Meters
Mass-Kilogram
Liquid Volume- Liters
You're driving along, and you see the light turn red, 1/2 block
in front of you. You gently put on the brakes.
The car loses kinetic energy and slows down.
The brakes absorb the kinetic energy, and they heat up.
______________________________________
If you're, let's say, coming down a mountain or a really long
hill, then the potential energy you had at the top changes to
kinetic energy, little by little, as you come down. Whenever
the speed of the car gets too high, you push the brakes to
slow it down. Then you take your foot off of the brakes, and
let them cool.
If you don't do that, and instead you keep your foot on the brakes
all the time, then the brakes keep getting hotter and hotter, and
by the time you get to the bottom, you have flames shooting out
from the hubcaps and burning the paint off the fenders !
I only saw this happen once, many years ago, when I was in a car
coming down a long road from the top of a mountain in China.
Thank goodness I was not the person who was driving !
I would have been seriously embarrassed.