Ankit Jain Education's video: NCERT SOLUTIONS WORK AND ENERGY Science Ch-11 CLASS 9 PHYSICS part-2 BY ANKIT JAIN

NCERT SOLUTIONS WORK AND ENERGY Science Ch-11 |CLASS 9 PHYSICS part-2| Q9. A certain household has consumed 250 units of energy during a month How much energy is this in joules? Q10. An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy. If the object is allowed to fall, find its kinetic energy when it is half-way down. Q11. What is the work done by the forge of gravity on a satellite moving around the earth? Justify your answer. Q12. Can there be displacement of an object in the absence of any force acting on it? Think Q13. A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not? Justify your answer. Q14. An electric heater is rated 1500 W. How much energy does it use in 10 hours. Q16. An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest. Q18. In each of the following a force, F is acting on an object of mass m. The direction of displacement is from west to east shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero. Q19. Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why? Q20. Find the enemy in kwh consumed in 10 hours by four devices of power 500 W each Q21. A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy? NCERT SOLUTIONS WORK AND ENERGY Science Ch-11 |CLASS 9 PHYSICS part-2| CLASS 9, 10, 11, 12 VIDEOS ALL THE VIDEO HAS LANGUAGE ENGLISH MIXED WITH HINDI ACCORDING TO CBSE NCERT FULL EXPLANATION as that of the classroom lectures. This complete chapter WORK AND ENERGY (Science class 9 chapter 11) will be comprising of small videos and we will complete syllabus as recommended by CBSE and NCERT AND different board through out india