Science and Technology I · Textbook solutions

Space Missions

Every solved example, exercise, and miscellaneous question — in the order the textbook teaches them. · 15 questions

Exercise

15 q

Fill in the blanks and explain the statements with reasoning:
Ex Q1(a) $If the height of the orbit of a satellite from the earth surface is increased, the tangential velocity of the satellite will \dots$
Ex Q1(b) $The initial velocity (during launching) of the Managalyaan, must be greater than \dots\dots\dots\dots..of the earth.$
State with reasons whether the following sentences are true or false
Ex Q2(a) $If a spacecraft has to be sent away from the influence of earth's gravitational field, its velocity must be less than the escape velocity.$
Ex Q2(b) $The escape velocity on the moon is less than that on the earth.$
Ex Q2(d) $A satellite needs a specific velocity to revolve in a specific orbit.$
Ex Q2(e) $If the height of the orbit of a satellite increases, its velocity must also increase.$
Answer the following questions:
Ex Q3(a) $What is meant by an artificial satellite? How are the satellites classified based on their functions?$
Ex Q3(b) $What is meant by the orbit of a satellite? On what basis and how are the orbits of artificial satellites classified?$
Ex Q3(c) $Why are geostationary satellites not useful for studies of polar regions?$
Ex Q3(d) $What is meant by satellite launch vehicles? Explain a satellite launch vehicle developed by ISRO with the help of a schematic diagram.$
Ex Q3(e) $Why it is beneficial to use satellite launch vehicles made of more than one stage?$
Ex Q4 $Complete the following table. IRNSS Weather study & predict Earth's observation$
Solve the following problems.
Ex Q5(a) $If mass of a planet is eight times the mass of the earth and its radius is twice the radius of the earth, what will be the escape velocity for that planet?$
Ex Q5(b) $How much time a satellite in an orbit at height 35780 km above earth's surface would take, if the mass of the earth would have been four times its original mass?$
Ex Q5(c) $h_1$


IRNSS
	Weather study & predict
		Earth's observation