Advertisements
Advertisements
Question
Name the forms of energy which a wound-up watch spring possesses.
Advertisements
Solution
Elastic potential energy is possessed by wound up watch spring
RELATED QUESTIONS
Define work.
A body, when acted upon by a force of 10 kgf, moves to a distance 0.5 m in the direction of force. Find the work done by the force. Take 1 kgf = 10 N.
How many joules are there in 1 mega joule?
Define Translational motion.
Is power a scalar or a vector quantity?
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.
(i) Calculate the work done by force in moving the block from A to B.
(ii) Calculate P.E. gained by block. [g=10ms-2]
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
