Advertisements
Advertisements
Question
Explain the motion of a planet around the Sun in a circular path.
Solution
A planet moves around the Sun in a nearly circular path for which the gravitational force of attraction on the planet by the Sun provides the necessary centripetal force required for circular motion.
APPEARS IN
RELATED QUESTIONS
Define the term 'centre of gravity of a body'.
A square cardboard is suspended by passing a pin through a narrow hole at its one corner. Draw a diagram to show its rest position. In the diagram, mark the point of suspension by the letter S and the centre of gravity by the letter G.
The figure shows three pieces of cardboard of uniform thickness cut into three different shapes. On each diagram draw two lines to indicate the position of the centre of gravity G.
The centre of gravity of a uniform ball is ______.
A right-angled triangle cardboard piece is placed as shown in fig. 7. Redraw the diagram showing the relative position of the vertices of the triangle when it is suspended by a pin from the hole A. Explain why the position changes?
Even though the Tower of Pisa is leaning through an angle it does not fall.
The centre of gravity of a hollow cone of height h is at distance x from its vertex where the value of x is ______.
Explain the term ‘centre of gravity’ of a body.
State two methods of increasing the stability of the body.
A boy of mass 40 kg runs up a height of 30 steps, each 20 cm high. Find:
(i) The force of gravity acting on the boy.
(ii) The work done by the boy against gravity. (Take g = 9.8 ms−2)