Answer the following questions:
Classify the following into potential energy and kineti energy:
(1) Water stored on the top of a hill (2) An arrow released from a stretched bow (3) A stretched spring (4) A revolving electric fan.

Answer the following questions: Classify each of the following into kinetic energy, potential energy or kinetic energy and potential energy: (1) A compressed spring (2) The wound up spring of a watch (3) A raised hammer (4) A bullet released from a gun (5) A falling stone (6) The swinging pendulum of a clock (7) The explosive mixture in a bomb (8) wind (9) Water stored in a dam (10) A stretched bow string (11) Running water (12) waterfall.

An arrow is released from a stretched bow: Where did the energy required to cause the motion of the objects come from?

Answer the following questions.If A=[[2,-1],[-1,2]] show that A^ 2-4A+3I=0

Answer the following questions : What is the effect on the magnetic needle in Oersted's experiment, when (1) a current is passed through the wire (2) the current through the wire is increased (3) the current through the wire is stopped (4) the current through the wire is reversed (5) the distance between the magnetic needle and the wire is increased, keeping the current through the wire constant ?

Answer the following questions.Evaluate |(1,-3,12),(0,2,-4),(9,7,2)|

When a long spring is stretched by 2cm, its potential energy is U. If the spring is stretched by 10cm, the potential energy stored in it will be

Answer the following questions. If A=diag[2,-3,-5],B=diag[4,-6,-3] and C=diag[-3,4,1] then find B+C-A

Answer the following If 3000 tons of water falls from 10 m high dam in one minute, then calculate the equivalent power if all its energy is utilised. (1 ton = 1000 kg)

Answer the following questions:Show that the points (2,-1),(0,2),(2,3) and (4,0) are the vertices of a parallelogram.Also find the acute angle between the diagonals.

Answer the following questions. If A=diag[2,-3,-5],B=diag[4,-6,-3] and C=diag[-3,4,1] then find 2A+B-5C