What does ‘NASA’ stand for? You were not told this in the text. You will need to look this up.
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Question No. 2
What is Newton’s third law of motion?
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Question No. 3
A physicist throws an egg against a brick wall. The result is entirely as expected. She now hangs a thick blanket about 5 cm in front of the wall, puts some cushions below the blanket, and throws another egg at the blanket-shielded wall. Do you think the egg will break? Briefly explain your view.
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Question No. 4
If you jump from a small height down to the ground it is important to bend your knees as you land. Why?
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Question No. 5
How are the quantities force and pressure related? What is the SI unit of pressure? How is this unit defined?
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Question No. 6
Your elder sister is good at maths, but does not study physics. She is taking driving lessons. Explain to her why seatbelts are important.
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Question No. 7
What is the difference between a rocket and a jet?
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Question No. 8
Write brief notes on ‘gravitational mass’ and ‘inertial mass’.
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Question No. 9
The moon has a mass of about one eightieth that of earth, yet moon’s surface gravity is about one sixth of earth’s surface gravity. Why is this?
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