Physics
Fill in the blanks :
(a) When a stone tied to a string is rotated in a horizontal plane, the tension in the string provides …………… force necessary for circular motion.
(b) Work done by this force at any instant is …………… .
Related Questions
A block of glass is pushed into the path of the light as shown below. Then the converging point X will :
- Move away from the slab
- Move towards the slab
- Not shift
- Move towards the left side of the lens
(a) In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
(b) Name the class of the lever shown in the picture below :
A non uniform beam of weight 120 N pivoted at one end is shown in the diagram below. Calculate the value of F to keep the beam in equilibrium.
Meera chose to use a block and tackle system of ‘9’ pulleys instead of a single movable pulley to lift a heavy load.
(a) What is the advantage of using a block and tackle system over a single movable pulley?
(b) Why should she connect more number of pulleys in the upper fixed block?