Advertisements
Advertisements
Question
Fill in the boxe to show the corresponding energy transformation.
Advertisements
Solution
Chemical energy ⇌ Electrical energy
APPEARS IN
RELATED QUESTIONS
Is work a scalar or a vector quantity?
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
Explain the difference between a uniform linear motion and a uniform circular motion.
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
(a) Define power and name its unit.
(b) A girl weighting 50 kg climbs up 60 steps each of 20 cm height in 5 minutes. Calculate the power developed.
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
(i) Calculate the mechanical advantage of the inclined plane. (ii) Calculate the effort applied by the coolie.
(iii) In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.
