Advertisements
Advertisements
प्रश्न
Explain the motion of a planet around the sun in a circular path.
Advertisements
उत्तर
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.
संबंधित प्रश्न
Where can a body execute free vibrations?
State the effect of force F in of the following diagram.
What is thrust?
A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following
1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?
2) Is there any force acting on the rocket? if yes, how much?
What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?
Classify the following amongst contact and non-contact forces.
Frictional force
Classify the following amongst contact and non-contact forces.
electrostatic force
Classify the following amongst contact and non-contact forces.
magnetic force
State whether the moment of force is a scalar or vector quantity?
The diagram in Fig shows two forces F1 = 5 N and F2 = 3 N acting at points A and B respectively of a rod pivoted at a point O, such that OA = 2 m and OB = 4 m.
Calculate:
- the moment of force F1 about O.
- the moment of force F2 about O.
- total moment of the two forces about O.
