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100 gm is proj, , , , ected upwards with vel, , , , > by air resistance. Deity 10 vy, , , , , , Ireturns back with 6 m, , , , time graph of a p, a pe, , , , , , ticle of me, , , , , , , , , 2kg moving, , , , , , , , , , , , , a work done by all the forces act Na straight line is as shown in Fig, 9, S acting on the particle as shown in Fig, Fig. 9.20, 3, Is work-energy theorem valid in a non-inertial frame? 35, particle of mass m Moves ona st }, a4 A moves on a straight line with its velocity varying with the distance travelled, , , , , , , ording to the equation v =avx, where @ is. a 6, , , , onstant, Find the total work done by all the, , , , , , , , ; jorces during a’ displacement from x =O to x =b ’, ss is raised a distance of 4 m by a vertical force of 80 N. Find the final kinetic eneray 0 ', e mass if it was originally at rest. @ = 10 mis? q 4, , , , , , , , , , 6, Anobject of mass m has a speed Vy as it passes through the origittlt is subjected to a retarding \, force given by Fy =—Ax. Here, A Is a positive constant, Find its x-coordinate when it stops <1, 7. Ablock of mass M is hanging over a smooth and light pulley through a light string, The other end ', of the string is pulled by a constant force F The kinetic energy of the block increases by 40J in \ t, , , , 1s. State whether the following statements are true or false:, , , , , a) The tension in the string is Mg, , (b) The work done by the tension on thé block is 40 J, ¢) The tension in the string ts F, , 3) The work done by the force of gravity is 40J in the above ts, 8. Displacement of a particle of mass 2 kg varies with time ass = (20? = 2¢ + 10) m. Find total work, , , , , , , , , , @ PTOCESS., , done on the particle in a time interval fromt Otot=2s. i, 9. Ablock of mass 30 kg is being brought down by a chain. Ifthe block acquires a speed of 40 en's t, , n dropping down 2 m. Find the work done by the chain during th, , , , , , Potential Energy, , possessed by a body or s;, , , , ystem by virtue of its position of configuration is known as, , hed to a compressed or elon, apacity to do work Similarly, a sto, , , , , , ated spr, , , , , one when, , , , ential energy. For example, @ block attac!, , r Phis ok has ac, , od elastic potential energy. This bloc : Y tk, Silay, 8 st, , m9 cont I ; | 9 has energy in the form of gravitational potential en, ht also has energy) y, , as electric potential energy, , , , , , vy. Two, , , , ged particles kept at certain distance ha, , , , ‘om a certain heig!
