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11年级物理期末考试1. Recall what happens to the atomic number and mass number of a nucleus when it undergoes: (C) a alpha decay b beta decay2. List the seven fundamental units of the international system. (C)3. A cyclist starts from rest and attains a velocity of 20 m s1 in 4 seconds. Calculate (a) the acceleration, assumed constant; (b) the displacement. (C)4. For the motion of the bungee jumper shown in the Figure: (C) (a) calculate the displacement and distance travelled after 20 s;(0-20s)(b) calculate the acceleration at 10 s, (c) sketch an accelerationtime graph.5. A force of 10.0 N WN and 10.0 N EN acts on the same point P. Determine the total force acting on that point. (C)6 . A stone is dropped from a bridge 50 m above the water. Exactly 1 s later, another stone is thrown down so that both stones strike the water together. (B)What is the total time taken for the stones to reach the water? Plot a vt graph of both stones on the one graph. 7. A newspaper article quotes a safety expert who says, “A person not wearing his seatbelt in a 50km h -1 car crash will experience the same effects as if dropped onto the concrete ground from the second floor of a building.” Explain whether you a

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