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प्रश्न
What do you mean by the term free fall ?
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उत्तर
A falling body, on which only the earth’s gravity acts, is known as a freely falling body and such a fall is known as free fall.
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संबंधित प्रश्न
A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 m/s2, find the maximum height reached by the stone. What is the net displacement and the total distance covered by the stone?
The values of g at six distances A, B, C, D, E and F from the surface of the earth are found to be 3.08 m/s2, 9.23 m/s2, 0.57 m/s2, 7.34 m/s2, 0.30 m/s2 and 1.49 m/s2, respectively.
(a) Arrange these values of g according to the increasing distances from the surface of the earth (keeping the value of g nearest to the surface of the earth first)
(b) If the value of distance F be 10000 km from the surface of the earth, state whether this distance is deep . inside the earth or high up in the sky. Give reason for your answer.
Why does a sharp knife cut objects more effectively than a blunt knife ?
Name the force which wears away two surfaces as they move over one another.
Name the force which stops you falling through the floor.
A pressure of 10 Pa acts on an area of 3.0 m2. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?
A force of 15 N acts on a body of mass 2 kg. Calculate the acceleration produced.
A force of 10 N acts on a body of mass 5 kg. Find the acceleration produced.
What is the acceleration due to gravity?
Distinguish between:
Universal gravitational constant – Gravitational acceleration of earth.
