Physics
Grade-10
Easy
Question
If r represents the radius of the orbit of a planet of mass m moving around the Sun of mass M, the orbital velocity of the planet is given by:
Hint:
When a planet revolves around the sun, the centripetal force is provided by the gravitational force exerted on the planet by the Sun.
The correct answer is:
Mass of the Sun = M, Mass of the planet = m, The centripetal acceleration of the planet = ac
Fg = Fc = mac
GMm/r2 = mv2/r
Hence the orbital velocity v for the planet is given by
V = √GM/r
Where G = Universal Gravitational Constant
V2 = GM/r
Related Questions to study
Physics
If suddenly the gravitational force between the Earth and a satellite revolving around it becomes zero, what will happen?
If suddenly the gravitational force between the Earth and a satellite revolving around it becomes zero, what will happen?
PhysicsGrade-10
Physics
The force acting between the objects in space is __________ force.
The force acting between the objects in space is __________ force.
PhysicsGrade-10
Physics
What would happen to the Earth if the gravity of the Sun was lost someday?
What would happen to the Earth if the gravity of the Sun was lost someday?
PhysicsGrade-10
Physics
What would happen to the Moon if the gravity of the Earth was lost someday?
What would happen to the Moon if the gravity of the Earth was lost someday?
PhysicsGrade-10
Physics
Which one of the following options is correct about the centripetal force?
a. It pulls an object towards the other
b. It keeps the body moving in a circular path
c. It acts perpendicular to the motion of the body
d. It is an attractive force
Which one of the following options is correct about the centripetal force?
a. It pulls an object towards the other
b. It keeps the body moving in a circular path
c. It acts perpendicular to the motion of the body
d. It is an attractive force
PhysicsGrade-10
Physics
Which one of the following options is correct about the motion of the Moon around the Earth?
a. The Moon falls towards the center of the Earth at every point at every point of its motion.
b. The Moon hits the surface of the Earth.
c. The direction of motion of the Moon and the direction of gravitational force are always perpendicular.
Which one of the following options is correct about the motion of the Moon around the Earth?
a. The Moon falls towards the center of the Earth at every point at every point of its motion.
b. The Moon hits the surface of the Earth.
c. The direction of motion of the Moon and the direction of gravitational force are always perpendicular.
PhysicsGrade-10
Physics
In which direction does the velocity of a body move in a circular motion point?
In which direction does the velocity of a body move in a circular motion point?
PhysicsGrade-10
Physics
In space, there is:
In space, there is:
PhysicsGrade-10
Physics
The direction in which the gravity of the Earth acts is:
The force of gravity acts along the line joining centers of the two bodies. Regarding the direction, it always acts towards the center of the heavier body.
The direction in which the gravity of the Earth acts is:
PhysicsGrade-10
The force of gravity acts along the line joining centers of the two bodies. Regarding the direction, it always acts towards the center of the heavier body.
Physics
What is the direction of the centripetal acceleration w.r.t the centripetal force?
What is the direction of the centripetal acceleration w.r.t the centripetal force?
PhysicsGrade-10
Physics
Which force is necessary to keep a body moving a circular path?
Which force is necessary to keep a body moving a circular path?
PhysicsGrade-10
Physics
The force which is responsible for the motion of bodies revolving around the Earth:
The force which is responsible for the motion of bodies revolving around the Earth:
PhysicsGrade-10
Physics
A person lifts a piece of luggage of 10 kg at the height of 2 m above the ground. What is the potential energy possessed by the luggage?
A person lifts a piece of luggage of 10 kg at the height of 2 m above the ground. What is the potential energy possessed by the luggage?
PhysicsGrade-10
Physics
A ball is projected upwards. As it moves up, there is an increase in its:
A ball is projected upwards. As it moves up, there is an increase in its:
PhysicsGrade-10
Physics
A ball weighing 0.5 kg has a kinetic energy of 1 joule when its speed is:
A ball weighing 0.5 kg has a kinetic energy of 1 joule when its speed is:
PhysicsGrade-10