Question
9 Two stidern sit in idesical office chars facing each other Bob bas a mass o 95 kg,while Jim has a mas okE Bob places his bare feet ofn ims knees, as sheu n to the right. Bob thea suddetily pashes curward wh is feet, caning both choirs move In this siuation while Bob's feet xt in costact wh Jan's krees Bob im A. Neither student esersi a force on the other B. Bob everts& farce on Sum, bur Jm doen't exert any force on Bob C Each audern exents a force on the other, bus lim exets the larger Sonce esdem exents a fonce on the other, but Bob eserts the larger force. E. Esch studen: eserts the same anourt of force os the oher J. None of these arswers is cofrect. Questions 40-43 refer to a loy car wtuch can move so the tight oe left along a horizontal line (the pertice of the distance axs) The tion is to dhe right Choose the currecte cry-time graph(A·G) for hof the follow nE quedam, than ance or not at alL If you think thal nore is cOect, anawer choice you may use , Snih more None ot these graphs is comta. which velocity graph shows the car mvng oward the nghiagay from the oren) at a steady constant) velocty which ricity graph shows the car reversing direction, which velocity graph shows the car moving sward the left adward the ongin) at a steady (constant) velocity? Which velocity graph shows the car moeasing its speed ar rale? 40, 41, 42, 43. s eady lemaan T-6 Forice and Motion hree and Mcon Comceptal Evakunsm3/w
Explanation / Answer
39 ]
Each student applies same force on other causing both the chairs to move.
This situation is in consistency with Newton's third law which states that to every action there is an equal and opposite reaction.
40]
Graph A shows that the car moves with a steady velocity away from the origin.
41] Graph B shows the reverse situation.
42] Graph B shows that it is moving towards the origin.
43] Graph D shows that the speed of the car is increasing at a constant rate.
