A45 kg boy runs at a rate of 2.5 m/s and jumps on top of a stationary skateboard that has a mass of 4 kg. after jumping onto the board, the boy and the board travel off together. assuming that momentum is conserved, what is the final speed of the boy and the board?
in this question we have given,
power of motor=150watts
we know that,
by definition we know that we can calculate the frequency of an electromagnetic wave by wavelength, using the following equation:
λ is the wavelength.
c is the speed of light
f is the frequency.
we know that the speed of light is:
finally, the frequency is