Physics
(i) Draw a diagram to show a block and tackle pulley system having a velocity ratio of 3 marking the direction of load (L), effort (E) and tension (T).
(ii) The pulley system drawn lifts a load of 150 N when an effort of 60 N is applied. Find it's mechanical advantage.
(iii) Is the above pulley system an ideal machine or not?
Related Questions
(i) Derive a relationship between S.I. and C.G.S. unit of work.
(ii) A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force. What should be the value of θ to get the maximum positive work?
An object AB is placed between O and F1 on the principal axis of a converging lens as shown in the diagram.
Copy the diagram and by using three standard rays starting from point A, obtain an image of the object AB.
A half metre rod is pivoted at the centre with two weights of 20 gf and 12 gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
(i) Which of the two forces acting on the rigid rod causes clockwise moment?
(ii) Is the rod in equilibrium?
(iii) The direction of 20 gf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
A ray of light XY passes through a right angled isosceles prism as shown below.
(i) What is the angle through which the incident ray deviates and emerges out of the prism?
(ii) Name the instrument where this action of prism is put into use.
(iii) Which prism surface will behave as a mirror?