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प्रश्न
What do you mean by free fall?
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उत्तर
- The gravity of the Earth attracts every object towards its centre.
- When an object is released from a height, it falls towards the surface of the earth under the influence of gravitational force.
- The motion of the object is said to have free fall.
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संबंधित प्रश्न
A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground.
What force is responsible for the earth revolving round the sun ?
During a free fall, will heavier objects accelerate more than lighter ones ?
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.
Explain why, a wide steel belt is provided over the wheels of an army tank.
Name the force which wears away two surfaces as they move over one another.
A force of 15 N acts on a body of mass 2 kg. Calculate the acceleration produced.
A force causes an acceleration of 10 m s-2 in a body of mass 500 g. What acceleration will be caused by the same force in a body of mass 5 kg?
A body falls freely under gravity from rest and reaches the ground in time t. Write the expression for the height fallen by the body.
Write scientific reason.
The value of gravitational acceleration (g) decreases as we go deep inside the earth.
