Advertisements
Advertisements
प्रश्न
Multiple Choice Question. Select the correct option.
The mass of earth is 6 × 1024 kg and radius of earth is 6.4 × 106 m. The magnitude of force between the mass of 1 kg and the earth is:
पर्याय
9.770 N
9.810 N
830 N
9.790 N
Advertisements
उत्तर
9.770 N
Explanation:
Mass of earth = m1 = 6 × 1024 kg
Mass of the body = m2 = 1 kg
Radius of earth = r = 6.4 × 106 m
Universal gravitational constant = G = 6.67 × 10−11 Nm2 kg−2
Force = F = ?
F = `("G m"_1 "m"_2)/"r"^2=(6.67xx10^-11xx6xx10^24xx1)/(6.4xx10^6)^2`
= `(6.67xx6xx10^(-11-12+24))/(6.4xx6.4)`
F = `(6.67xx6xx10)/(6.4xx6.4)`
F = 9.770 N
APPEARS IN
संबंधित प्रश्न
What happens to the force between two objects, if the distance between the objects is doubled and tripled?
A person brings a mass of 1 kg from infinity to a point A. Initially the mass was at rest but it moves at a speed of 2 m s −1 as it reaches A. The work done by the person on the mass is −3 J. The potential at A is
A tunnel is dug along a diameter of the earth. Find the force on a particle of mass m placed in the tunnel at a distance x from the centre.
State whether the gravitational force between two masses is attractive or repulsive ?
Define one Newton. How much maximum acceleration can it produce in a mass of 1 kg?
What does a force do in the following case?
You apply brakes to a running car.
Name and state the action and reaction in the following case:
A person walking on the ground.
Answer the following question.
What are the dimensions of the universal gravitational constant?
Different points in earth are at slightly different distances from the sun and hence experience different forces due to gravitation. For a rigid body, we know that if various forces act at various points in it, the resultant motion is as if a net force acts on the c.m. (centre of mass) causing translation and a net torque at the c.m. causing rotation around an axis through the c.m. For the earth-sun system (approximating the earth as a uniform density sphere).
Who measured the value of the Universal Gravitational Constant G using the Cavendish balance?
