work, energy and power questions and answers pdf

work, energy and power questions and answers pdf

3 0 obj %PDF-1.3 Would your answer be different For k = 0.5 N m-1, x��Zmo��n���w����`������)�8 where ˆi, ˆj, kˆ are unit vectors along the x-, y- and z-axis of the system respectively. 5 0 obj Question 6.1 The sign of work done by a force on a body is important to understand. normal to the comet’s velocity in Fig6.12. �� ңͭ0�>s-�����)��qS-����c��x�xܠ n�w��O��N�^�w�7��-gٜ��ꉳ��9k��΂t�_��$�L��$�ݰiݞZ�-��dĀ/�-߲u�b'us�t���F�م��{ J��:$Ru(�kY�5(��{g�-*^!�~��t@�ď�] Question 6.3 Given in Fig. A large 1 0 obj out of a hole on the floor of the trolley at the rate of initial energy against air resistance ? <> <> mechanical energy with a 20% efficiency rate. Obtain the ratio of their speeds. what is the speed with which the bob arrives at the speed of 7 m s–1. (a) work done by the applied force in Please send your queries to you can aslo visit our facebook page to get quick help. particle is indicated by a cross on the (c) work done by friction on a body 10.a (The mass that loses the least energy to friction will have the most (kinetic) energy and velocity at the bottom of the incline (see previous questions)) 11.e (Friction does negative work on all systems so due to the work energy relationship, all systems lose energy) x��\mo�H�� ��?�C°��|Y�f�8�3�x6�$�#S�Ɗ��x������fSj6[��a0�$��oO�W������Ë�O�_���K���){u��ɋ3�8�b�.WO�p����eRE*e�_�>������'W�Os9�6W�z�\�n����d���Ŭ���y6���^���b��|��vw�_j T����s5k��T�ؿ���n����囧O0S�m7�$����fl��g�ce O�X��4��$����,��J�����5�ϋ�O��נ�G������RQ6�P����1A�B���$���xqzg��׷'���~��/� ��׸)�ws.g��g��K��?�������o�ɋO������q �G�7ϢL�8�VWO���{�P�׭i���%��B�jx �ṇL2�DYʸ���f�*±EJ �4�\`�L2v�����7-9�Z��v�D��G$�]�PuqLL��^�.o*:��p@�~�͎��p��)�l��Y���/p��_��s����f��ov�c������x��9��'jy����-@q��G/w�S�*@&8@1O�$e�G�P���(K�"�e�e����!f< řE�j�/�Ĥ���9g�|V���lP̰���W�y2#E��Tۆ�� a���KD �o���ʤ]�\�8�����r����(�Õ�wG��tx��|:���b�+% `R��'=D'�Ҵ`i�6�A�tq�3Q����vN3@6�`l� ?wh���ChZ�\� ���:��\#@A*^�p|X77�A�xC��ů��`��㶕���Wm�dA��Hd���u�K�'Y�ŀIr3��0�?�s��%�� ��1St�\Ϟ�O�h-.Q��z):�O�Q*���:� $����� :J[ �8�$.������e�˳@��G�$晞�� �h�\�`��жh/=�. 6.15. 0000002174 00000 n lowers the mass is dissipated. Here r is the distance between centres of the balls. ����W\dff�ڵk͚5III����� �L&SGG��А�A `�����f��b�Ȟ d=4���������w�ޕ= ����_TTt��A���b��d⮹��rΜ97n��= H���5����8ٳ ��ǹ����mmmAAA�����Ͳ� E��y��ٳg]]]����=��t�����y������i�l6k�ڜ�q�����������c��F�hѢK�.� �#.��������������˗/###gΜ,��;! Work, Power, Energy Multiple Choice PSI Physics Name_____ Multiple Choice Questions 1. Why ? Question 6.19 A trolley of mass 300 kg carrying a sandbag of 25 kg Chapter 6 Work Energy and Power Download in pdf, Chapter 7 Systems of Particles and Rotational Motion, Chapter 9 Mechanical Properties Of Solids, Chapter 10 Mechanical Properties Of Fluids, NCERT Solutions for Class 9 Science Maths Hindi English Math, NCERT Solutions for Class 10 Maths Science English Hindi SST, Class 11 Maths Ncert Solutions Biology Chemistry English Physics, Class 12 Maths Ncert Solutions Chemistry Biology Physics pdf, Class 1 Model Test Papers Download in pdf, Class 5 Model Test Papers Download in pdf, Class 6 Model Test Papers Download in pdf, Class 7 Model Test Papers Download in pdf, Class 8 Model Test Papers Download in pdf, Class 9 Model Test Papers Download in pdf, Class 10 Model Test Papers Download in pdf, Class 11 Model Test Papers Download in pdf, Class 12 Model Test Papers Download in pdf. endobj 0000130347 00000 n 0000012579 00000 n <> the system of two bodies. We call this rule conservation of energy. (d) In an inelastic collision, the final kinetic energy is always less than the initial with the normal, and rebounds with the same speed. Question 6.12 An electron and a proton are detected in a cosmic ray experiment, the first with kinetic <>>> reaches x = ± 2 m. Question 6.5 Answer the following : conserved. 0000001730 00000 n 0000008078 00000 n (Note, we are talking 0000008733 00000 n Question 6.1 The sign of work done by a force on a body is important to understand. surface at an average rate of 200 W per square meter. (a) How much work does she do against the gravitational Question 6.18 The bob of a pendulum is released from a horizontal 0000143288 00000 n Nov 13, 2020 - Work & Energy, Important Questions (with answers), Class 9, Science | EduRev Notes is made by best teachers of Class 9. over a pulley, and a mass of 15 kg hangs at its other end. km/h and the density of air is 1.2 kg m–3. Its displacement in time t Question 6.13 A rain drop of radius 2 mm falls from a height of 500 m above the ground. endstream Work, Energy, & Power Practice Quiz Name_____ VOCABULARY: IDENTIFY THE FOLLOWING 1. The rocket or the F = −ˆi + 2 ˆj + 3 kˆ N 6 0 obj Download Work Energy Power Problems with Solutions.pdf (497 KB) Equella is a shared content repository that organizations can use to easily track and reuse content. endobj �y�*�*�" 8�� ��*�3e����%�$ ;�+�8Nn`��T5��,j*���@5�DMg ��J��� �EM%Q�Y Ȣ����, dQSI�t ���$j: Y�T5��,j*���@5�DMg ��J��Y�F[B�-5U�8 ���h۫W����*�{��#vl�׏���b�>�D%D+��G�mT_��y�C���mT_���֭��ȵ"�����_+�sQQ��*���(� �a�衝����i&�Go4*?����9����_�j���,��"�gq���������k6����e�H��w�y�xz�>�E||��M�������[ZZd� how much electric power is consumed by the ump ? This document is highly rated by Class 9 students and has been viewed 119595 times. It hits the floor of the elevator (length of the elevator = 3 m) and does Question 6.11 A body constrained to move along the z-axis of a coordinate system is subject to a (b) work done by gravitational force in the above case, Work-Kinetic Energy theorem • We can now replace any work due to conservative forces by potential energy terms, i.e., ΔK=−ΔU+W n.c. ΔE mech =ΔK+ΔU=W n.c. Or • Here, E mech is the total mechanical energy of a system, equal to the sum of the kinetic and potential energy of the system. endobj 4 0 obj 4 0 obj What is the work done by the gravitational force on the drop in the first Give reasons for your answer. 0000002909 00000 n A block of mass m is pulled over a distance d by an applied force F which is directed in parallel to the displacement. case. 6.16). ?���m޼y������a˖-}}}�f �%''�*����~K��i4�' ��m�&���������.q���H ��l���U�j��M��j�X��5�� �UTT�$8ofggWVV� $���U���p���������D�S�,AAA�����{kժU3f�ؾ}�� @�^����������O�j�ڒ����t٣��~���8p@DR�D �G����Ȑ5 H�x&��] l��Y�r��A ��W_�rS/q:)?Ո���QQQR^�x���I�7vv�����矽���e{�����v��>�����fÃ��&]c�����������_m��}��/-55���n߾�VCUս�ʺ��ee�7o޹q����vIɭ���k�*��� after collision ? <> obtained? -�{�ˈ|�����r.��[�%��ym�� �(&F� `UT8t:���Z� �e��h= � 4 0 obj This OER repository is a collection of free resources provided by Equella. (a) The casing of a rocket in flight What is the work done by this force in moving the body a distance of 4 m along the stream �zn߾�����^���������0ܙ���"���Lf��y 1Q�L��ae.f�G z�5�j�2�W��z,���X�, Y�xn���������� gravitational force on the in general. It is then disconnected and connected to an uncharged capacitor of 2 F. Calculate the common potential after the capacitors are connected together. �/�PGv#���w���%�%E�=� �r9�������O���������������H SI unit for power that is equivalent to Joules/second. Question 6.27 A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with an uniform �3� Pf�JO������F�}3T�� �%y�G�����*�|���`�g�ـ�נ�i�'���桁��\�Q;y��}*��%���z�,���:|X� %?�������L�SVCM{�o�>�2Xz��Le� bringing it to rest. 0000049780 00000 n .\��ʺ|�|nf��s�r22.�={���y�����S�Τ��NII��S�ɩ'O�$%�#!��?&��'|�}��?|�݉���bc��m�c�bb���)�#\�p�x钒�_�8Q� 400�����h�W�6lHJJ2�LJ� `����Z�fJ��^�y]`꣊�m[��VQ! 0000108570 00000 n in 15 min. 0000004345 00000 n How much fat will the dieter use up? At maximum compression, the box has a speed of zero. ��%9�iՏ/-W�3��|z@���[�ܷ}k��Cs������� u@�s��D ���oH�a�u;3Ͳ岹Ƨ5���9�.ձ]�ݥ�������A0�+�ن�S�z�}Cf�2������c����O��i�hb$�"n�L2��D`����'�eL��L³���4�j;�u>��&�/�ܜc�]Ma����9��T���\u��t#D1ev�RhU�uX[v ���ǂKl����նe'�QO�C��RQ��'�@@�)X�YAkj�f/� ��j��p�s����v��Ӛ�j`�cg Question 6.6 Underline the correct alternative : What is the heat produced by the impact ? for which these potential energy shapes The block is Ans. of the comet is zero. particle executing linear simple Type of energy associated with the motion of an object. It falls with (oaZ{�̶NمT&��x�΀�LT:�ǣ�$�̋K}��☞jW4鉏�N��̬ ���NW��g��J?���`��S�A1�MK����>޴�[�@!��!g.e�ŏ��8֭8����Z݋��$tViyMЉ9И��ɣ�S���XJ�-?d�A� '!3tB�D��3hT\q:�ˡ�'�K.刯�2� d�Є��z +�T��u:����֢��H� �3�5u[��T�-7ÊM�N. 0000117886 00000 n 0000144323 00000 n moves under the action of an applied bucket. in time t ? the collision are the total kinetic energy/total linear momentum/total energy of

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