Physics
(i) With reference to the direction of action, how does a centripetal force differ from a centrifugal force during uniform circular motion?
(ii) Is centrifugal force the force of reaction of centripetal force?
(iii) Compare the magnitudes of centripetal and centrifugal force.
Answer
(i) Centripetal force always acts towards the centre of circle along it's radius. It is this force which compels the body to move along the circular path. A centrifugal force appears to act away (outward) from the centre of circular path. Thus, the two forces act in opposite directions.
(ii) No, the centrifugal force is not the force of reaction of centripetal force.
(iii) Centripetal force and centrifugal force have equal magnitudes.
Related Questions
A block and tackle system of pulleys has velocity ratio 4.
(i) Draw a neat, labelled diagram of the system indicating clearly the points of application and direction of load and effort.
(ii) What will be it's V.R. if the weight of the movable block is doubled?
A diver in water looks obliquely at an object AB in air.
(i) Does the object appear taller, shorter or of the same size to the diver?
(ii) Show the path of two rays AC & AD starting from the tip of the object as it travels towards the diver in water and hence obtain the image of the object.
Complete the path of the ray AB through the glass prism in PQR till it emerges out of the prism. Given the critical angle of the glass as 42°.
The figure alongside shows a simple pendulum of mass 200 g. It is displaced from the mean position A to the extreme position B. The potential energy at the position A is zero. At the position B the pendulum bob is raised by 5 m.
(i) What is the potential energy of the pendulum at the position B?
(ii) What is the total mechanical energy at point C?
(iii) What is the speed of the bob at the position A when released from B?
(Take g = 10 ms-2 and there is no loss of energy.)