please solve all of them and i will mark you brain list But answer should be correct
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Answer:
Q.2. The mass of moon is 1/100 times and its radius 1/4 times that of earth. As a result, the gravitational attraction on the moon is about one sixth when compared to earth. Hence, the weight of an object on the moon is 1/6th its weight on the earth
Q.3. According to the equation of motion under gravity v2 − u2 = 2gs
Where,
u = Initial velocity of the stone = 0 m/s
v = Final velocity of the stone
s = Height of the stone = 19.6 m
g = Acceleration due to gravity = 9.8 ms−2
∴ v 2 − 02 = 2 × 9.8 × 19.6
⇒ v 2 = 2 × 9.8 × 19.6 = (19.6)2
⇒ v = 19.6 ms−1
Hence, the velocity of the stone just before touching the ground is 19.6 ms−1 .
Q.4. If we assume that the acceleration due to gravity of the stone remains constant (g = 9.81 ms⁻²) throughout the 100m drop, then the speed will be, since it starts from rest:
v = (2*g*h)^{1/2} = (2*9.81*100)^{1/2} = 44ms⁻¹
Q.5 Newton's law of universal gravitation. Newton's law of gravitation, statement that any particle of matter in the universe attracts any other with a force varying directly as the product of the masses and inversely as the square of the distance between them.
it's importance:Gravity is a very important force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit
Q.6. A free falling object is an object that is falling under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall.