Advertisements
Advertisements
प्रश्न
A coin and a piece of paper are dropped simultaneously from the same height. Which of the two will touch the ground first ? What will happen if the coin and the piece of paper are dropped in vacuum ? Give reasons for your answer.
उत्तर
The coin will touch the ground first, because the relative air resistance on the paper is greater than on the coin (because the coin and the paper do not have the same density, so the proportion of air resistance as compared to weight is the one relevant on paper than on coin).
In a vacuum, both the coin and the piece of paper will drop at the same rate due to the absence of air resistance (their acceleration being the same).
APPEARS IN
संबंधित प्रश्न
Name the scientist who explained the motion of planets on the basis of gravitational force between the sun and planets.
What type of force is involved in the formation of tides in the sea ?
State the SI unit of acceleration due to gravity.
What assumption was made by Newton regarding the shape of an orbit of a planet around the sun for deriving his inverse square rule from Kepler’s third law of planetary motion ?
The masses of the earth and moon are 6 × 1024 kg and 7.4 × 1022 kg, respectively. The distance between them is 3.8 × 105 km. Calculate the gravitational force of attraction between the two?
Use G = 6.7 × 10–11 N m2 kg–2
The force of attraction between two unit point masses separated by a unit distance is called :
The weight of an object at the centre of the earth of radius R is :
In the relation F = G ✕ M ✕ m/d2, the quantity G:
According to one of the Kepler's laws of planetary motion :
An apple falls from a tree because of gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on earth, then
