Physics
A uniform meter scale of mass 60 g, carries masses of 20 g, 30 g and 80 g from points 10 cm, 20 cm and 90 cm marks. Where must be the scale hanged with string to balance the scale?
Related Questions
A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
The diagram below shows an object AB kept in front of the lens. The path of one ray coming from the object is shown:
(a) Name the lens L.
(b) Redraw and complete the ray diagram showing the formation of the image.
(c) In which optical instrument, is this kind of image formed?
(a) What is meant by static equilibrium? Give one example.
(b) A pulley system has four pulleys in all and is 95% efficient. Calculate
- MA
- Effort required to lift a load of 1000 N
If a man raises a box of 50 kg mass to a height of 2 m in 2 min, while the other man raises the same box to the same height in 5 min. Compare
(a) the work done and
(b) the power developed by them.