What would have happened if only the sun were to revolve and rotate on its axis and all the other planets in the Solar System were to be stationary? Please give relevant answers
Answers
Answer:
Explanation:
Mass of the bullet is m
b
=50gm=0.05Kg
Initial velocity of bullet u
b
=100m/s
Final velocity is v
b
=0m/s
(1) Initial momentum of bullet p
i
=m
b
u
b
=5Kgm/s
(2) Final momentum of bullet p
f
=m
b
v
b
=0.05×0=0
(3) Retardation occurred by the wooden block is
v
2
−u
2
=2as
−(100)
2
=2a(0.02)
a=−250000m/s
2
(4) Resistive force
F=ma
=0.05×−250000
=12500N
Explanation:
The sun certainly does rotate - it has a rotational period of about 25 days. This is apparent if you have ever used a telescope to project images of the sun onto a piece of white card so that you can see the sunspots. If you do this over several days, the sunspots appear to move across the face of the sun. Not only does the sun rotate, but it also orbits the centre of our galaxy, completing one orbit every 226 million years or so.
Paul Dodd, Docklands, Victoria
Yep, the Sun rotates on its own axis. The most convincing evidence of this is through the discovery and observation of sunspots (areas on the surface of the sun that are cooler in temperature, thus appearing as black spots - first observed by Galileo in the early 1600s). Sunspots come and go, isolated or in groups, and can be large or very small. The number of sunspots visible follows a cycle of solar activity of approximately 11 years thus revealing a cyclic pattern or rotation of the Sun.
Scoti Hayward, Newtown
The Sun rotates counter-clockwise but being gas, it may have a different spin rate at its equator from its poles. Magnetic fields would get wrapped up like knotted fishing line accounting for sunspots. The Sun also orbits the centre of the Milky Way at about 225 km/sec, and our galaxy itself has a motion in its Local Group of galaxies of about 100 km/sec. Our Local Group, in turn, has a speed of about 220 km/sec relative to the Super Cluster it resides in, and there are further layers of motion beyond that.