On a roller coaster ride the total mass of a cart - with two passengers included - is 319 kg. Peak K is at 43.6 m above the grou
nd and peak L is at 24.4 m. At location K the speed of the cart is 16.4 m/s, and at location L it is 12.4 m/s. (The wheel mechanism on roller coaster carts always keeps the carts safely on the rail.) How much mechanical energy is lost due to friction between the two peaks?
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At the top of the height, the velocity is zero and acceleration is negative of acceleration due to gravity ( i.e ).
The time of the ball in air is 3.2 s, so ascending time is .
Therefore from kinematic equation,
Substituting the values we get,
, Here v = 0 at top.
Now from equation,
, here h is the height .
So,
.
Thus, the ball reached at its maximum height of 12.48 m.
Let us assume that the definition of frequency, wavelength and wave speed is determined by the function
Here,
v = Velocity of wave
= Wavelength
f = Frequency
We know that the earth has the ability to absorb visible light but that it can also emit a longer radiation wavelength. This assessment allows us to confirm that option A. Is correct. In turn, if said wavelength is large, being inversely proportional to the frequency,
This does tend to be lower radiation. The correct options are:
A.The earth absorbs visible light and emits radiation with a longer wavelength.
B.The earth absorbs visible light and emits radiation with a lower frequency.