Advertisements
Advertisements
प्रश्न
Explain why, if a stone held in our hand is released, it falls towards the earth.
Advertisements
उत्तर
A stone, when released from the hand, falls towards the earth due to gravitational force. The gravitational force acts both on the stone and the earth. The stone attracts the earth with the same force by which the earth attracts the stone. Since, the stone’s mass is very small as compared to the earth’s mass, so acceleration produced in the stone is very large but that in the earth is negligible. Thus, the earth’s motion is not noticed, whereas that of the stone is.
APPEARS IN
संबंधित प्रश्न
A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.
A ball thrown up vertically returns to the thrower after 6 s. Find
- the velocity with which it was thrown up,
- the maximum height it reaches, and
- its position after 4 s.
Which force is responsible for the moon revolving round the earth ?
What force is responsible for the earth revolving round the sun ?
Explain what is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.
What do you understand by the term 'acceleration due to gravity of earth' ?
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 ?
What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand? State the assumption.
Write scientific reason.
The value of gravitational acceleration (g) decreases as we go deep inside the earth.
The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.
