Answer:
The 10 kg rock has more inertia than the other two rocks.
Explanation
I definitely agree with choise that you consider to be as a correct one. I am pretty sure that prganism is correct because this is a unit which ebrases all the mentioned points. And in simple words, the rest of options represent collective objects but you have to answer with sole one. Hope you find it helpful.
Answer
given,
mass of the jet airplane = 13500 kg
Force on the plane = 35700 N due north
force from wind = 15300 N in direction 80.0° south of west.
Force = 
force by wind =
N
=
N
net force on the jet airplane(ma)





a = 1.54 m/s²


Answer:

Explanation:
For this particular problem, we are going to use the non-relativistic Doppler effect which, is the change in frequency of a wave concerning an observer who's moving relative to the wave source. The shifted wavelength is:
,
where
is the wavelenght as it comes from the source,
is the velocity of the source (the quasar) and,
is the velocity of the wave. In this case, the velocity of the wave is the speed of light,
.
Solving for
,
,
now computing
,

The velocity of the quasar is negative because it is getting close to the Earth!
Just ignore the horizontal component
if you have a vertical displacement of 15m, 0ms^1 initial velocity, end velocity is ignored, we know the acceleration due to gravity as 9.81ms^2 so we can work out the time using SUVAT
S=15
U=0
V=?
A=9.81
T=?
S=UT + 0.5 AT^2
UT=0
therefore,
S=0.5AT^2
rearrange to:
T=SQR (2S/A)
T = 1.75 seconds