Answer:
A - 0 N
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To solve this problem we will apply the concept related to the kinetic energy theorem. Said theorem states that the work done by the net force (sum of all forces) applied to a particle is equal to the change experienced by the kinetic energy of that particle. This is:
Here,
m = mass
v = Velocity
Our values are given as,
Replacing,
Therefore the mechanical energy lost due to friction acting on the runner is 907J
Answer:
Happy now?
Explanation:
Correct answer:
Sound waves are longitudinal waves, meaning that the waves propagate by compression and rarefaction of their medium. They are termed longitudinal waves because the particles in the medium through which the wave travels (air molecules in our case) oscillate parallel to the direction of motion.
Answer:
Explanation:
Comment
Though it is easier to use the origin as one of the points to find the rise over the run, doing the question the more general way will help you with lines that do not go through the origin.
So pick any other two points.
P1(6 , 0.60)
P2(8 , 1.20)
Rise / Run = (y2 - y1)/(x2 - x1)
y2 = 1.20
y1 = 0.90
x2 = 8
x1 = 6
Rise over Run = (1.2 - 0.9) / (8 - 6)
Rise over run = 0.3 / 2
Technically stated in language, this is the answer. For every 2 pencils the cost goes up 0.3 cents. Carpenters would say it this way.
However in physics it can also be expressed as 0.15 dollars per pencil which is the cost per pencil.
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Just to show that you will get the same answer using the origin you can do it this way.
y2 = 0.6
y1 = 0
x2 = 4
x1 = 0
rise over run = (0.6 - 0)/ (4 - 0) = 0.6/4 = 0.15 / 1
