2021 WAEC Physics Theory (a) Name two artificial satellites. (b) A geostationary satellite moves in an orbit of radius...

(a) Name two artificial satellites.

(b) A geostationary satellite moves in an orbit of radius 6300 km. Calculate the speed with which it moves in the orbit. π = \(\frac{22}{7}\)

(a) Artificial Satellites: (i) Sputrik (ii) Explorer (iii) Astrosat (iv) Skylab (v) GOES (vi) ANIK (vii) GPS (viii) TERRIER (ix) MILSTAR (x) ISS.

(b) Calculation of speed:

V = \(\frac{2πR}{T}\) = \(\frac{2 * 22 *6300 * 10^3}{7 * 24 * 3600}\) = \(458.33ms^{-1}\)

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