science
Grade8
Easy
Question
Which of the following has no gravitational force involved?
- The motion of the blades of a fan
- The motion of a seesaw
- The motion of a swing
- The motion of a slide
Hint:
Gravity pulls the body towards earth.
The correct answer is: The motion of the blades of a fan
Here the correct option will be 'a' i.e; the movement of the blades of a fan . It is because the blades of the fan require centripetal force which is provided by the fan's machine and here no gravitational force is involved. While in all the other cases gravity is somehow responsible for the motion.
Related Questions to study
science
Why do satellites not fall back to the Earth from their respective orbits?
(a) They are under the constant influence of gravitational force due to the Earth.
(b) They are under the constant influence of centripetal force.
(c)The centripetal force is supplied by the gravitational force
Why do satellites not fall back to the Earth from their respective orbits?
(a) They are under the constant influence of gravitational force due to the Earth.
(b) They are under the constant influence of centripetal force.
(c)The centripetal force is supplied by the gravitational force
scienceGrade8
science
Which of the following would happen to the Earth if the gravity of the Sun is lost someday?
Which of the following would happen to the Earth if the gravity of the Sun is lost someday?
scienceGrade8
science
An object performing a uniform circular motion is under the action of _____.
An object performing a uniform circular motion is under the action of _____.
scienceGrade8
science
Which of the following has no gravitational force involved?
Which of the following has no gravitational force involved?
scienceGrade8
science
Which of the following would happen to the Moon if the gravity of the Earth is lost someday?
Which of the following would happen to the Moon if the gravity of the Earth is lost someday?
scienceGrade8
science
In which direction does a falling object on the Earth move?
In which direction does a falling object on the Earth move?
scienceGrade8
science
What is the nature of gravitational force?
What is the nature of gravitational force?
scienceGrade8
science
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?
scienceGrade8
science
In which of the following case (s) is the centripetal force not supplied by the gravitational force?
In which of the following case (s) is the centripetal force not supplied by the gravitational force?
scienceGrade8
science
Which of the following can possibly be done to make an object revolve around the Earth in a particular orbit?
(a) Launch it at a sufficiently high velocity
(b) Launch it from a high altitude
(c) Launch it from the ground
Which of the following can possibly be done to make an object revolve around the Earth in a particular orbit?
(a) Launch it at a sufficiently high velocity
(b) Launch it from a high altitude
(c) Launch it from the ground
scienceGrade8
science
Which of the following is true about the centripetal force?
(a) It pulls an object towards the other
(b) It keeps a body moving in a circular path
(c) It acts perpendicular to the motion of the body
(d) It is an attractive force
Which of the following is true about the centripetal force?
(a) It pulls an object towards the other
(b) It keeps a body moving in a circular path
(c) It acts perpendicular to the motion of the body
(d) It is an attractive force
scienceGrade8
science
Which of the following is true about the motion of the Moon around the Earth?
(a) The Moon falls towards the center of the Earth at every point of its motion
(b) The Moon hits the surface of the Earth
(c) It does not hit the surface of the Earth because of the spherically curved surface
Which of the following is true about the motion of the Moon around the Earth?
(a) The Moon falls towards the center of the Earth at every point of its motion
(b) The Moon hits the surface of the Earth
(c) It does not hit the surface of the Earth because of the spherically curved surface
scienceGrade8
science
An object performing a uniform circular motion is under the action of _____.
An object performing a uniform circular motion is under the action of _____.
scienceGrade8
science
In which direction does the velocity of a body moving in a circular motion point?
In which direction does the velocity of a body moving in a circular motion point?
scienceGrade8
science
What is the direction of the gravitational force of the Earth?
What is the direction of the gravitational force of the Earth?
scienceGrade8
