(c) Work done in the motion of a body over a closed loop is zero for every force in nature. and kinetic energy can never be negative.The object can not exist in the region, where its K.E. Answer the following: E1= mgh = 3.35 x 10-5 x 9.8 x 500 = 0.164 J If you have any query regarding NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and power, drop a comment below and we will get back to you at the earliest. (c) Assume that the windmill converts 25% of the wind’s energy into electrical energy, and that A = 30 m2, v = 36 km/h and the density of air is 1.2 kg m-3 . What is the final speed of the trolley? Work done by the gravitational ‘ force of the sun over a closed path in every complete orbit of the comet is zero. What is the work done by the gravitational force on the drop in the first and second half of its journey? NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and power are part of NCERT Solutions for Class 11 Physics. Question 6. What is the work done by the net force during its displacement from x = 0 to x = 2 m? RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 11 Entrepreneurship, NCERT Solutions Class 11 Indian Economic Development, NCERT Solutions Class 11 Computer Science, Chapter 7 System of particles and Rotational Motion, Chapter 9 Mechanical Properties Of Solids, Chapter 10 Mechanical Properties Of Fluids, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10, Notions of work and kinetic energy : The work-energy theorem, The work-energy theorem for a variable force, Various forms of energy : the law of conservation of energy. Known : Mass (m) = 5000 kg. .’. Question 6. If there was no resistive forces, energy of drop on reaching the ground. 20. Answer: Here, m1 = 0.012 kg, u1 = 70 m/s Therefore, the trolley moves a distance = 2.5 x 10.36 m = 25.9 m. Question 6.29. We hope the NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and power help you. State carefully if the following quantities are positive or negative: Determine the net work done on the car. Applying principle of conservation of linear momentum, (m1 + m2) v = m1H1 + m2u2 = m1u1. Actual energy, E2 = 1/2mv2 = 1/2 x 3.35 x 10-5 (10)2 = 1.675 x 10-3J The block is released from rest with the spring in the unstretched position. Case II, E2 = 1/2 mv2 Topics and Subtopics in NCERT Solutions for Class 11 Physics Chapter 6 Work Energy and Power: Question 6. So, kinetic energy is positive. Answer:  P.E. Assume that the potential energy lost each time she lowers the mass is dissipated, (a) How much work does she do against the gravitational force? (b) What is the kinetic energy of the air? The bob transfers its entire momentum to the ball on the table. Which of the following potential energy curves in Fig. Consider the decay of a free neutron at rest: n > p + e–. Problem #1  The (United States) National Electric Code, which sets maximum safe currents for insulated copper wires of various diameters, i... Problem#1 A 50.0-g superball traveling at 25.0 m/s bounces off a brick wall and rebounds at 22.0 m/s.