2010年5月IB物理(SL)真题PDF下载-paper1
1. The best estimate for the time it takes light to cross the nucleus of the hydrogen atom is
A. 10−23s .
B. 10−20s.
C. 10−15s.
D. 10−7s.
2. The length of each side of a sugar cube is measured as 10 mm with an uncertainty of ± 2 mm.Which of the following is the absolute uncertainty in the volume of the sugar cube?
A. ± 6 mm3
B. ± 8 mm3
C. ± 400 mm3
D. ± 600 mm3
3. The time taken for a stone dropped from rest to fall vertically through 16 m is 2.0 s. Based on these measurements, what is the best estimate for the acceleration of free fall?
A. 4.0ms−2
B. 8.0ms−2
C. 9.8ms−2
D. 10ms−2
4. A wooden block is sliding down an inclined plane at constant speed. The magnitude of the frictional force between the block and the plane is equal to
A. zero.
B. the magnitude of the weight of the block.
C. the magnitude of the component of weight of the block parallel to the plane.
D. the magnitude of the component of the normal reaction parallel to the plane.
5. Which of the following is a correct statement of Newton’s second law of motion?
A. A force acting on a body is proportional to the mass of the body.
B. The rate of change of momentum of a body is equal to the net external force acting on the body.
C. The momentum of a body is proportional to the net external force acting on the body.
D. A force acting on a body is proportional to the acceleration of the body.
6. A ball of weight W is travelling horizontally towards a vertical wall. It strikes the wall and rebounds horizontally. The change in the magnitude of the momentum of the ball is Δp . Which of the following is the magnitude of the impulse that the ball imparts to the wall?
A. W + Δp
B. W − Δp
C. W
D. Δp
7. Two objects undergo an inelastic collision. Which of the following is correct in respect of both the conservation of momentum and the conservation of total energy of the system?
8. A particle P is moving anti-clockwise with constant speed in a horizontal circle.Which diagram correctly shows the direction of the velocity v and acceleration a of the particle P in the position shown?
9. Two objects are in thermal contact with each other. Which of the following will determine the direction of the transfer of thermal energy between the bodies?
A. The mass of each body
B. The area of contact between the bodies
C. The specific heat capacity of each body
D. The temperature of each body
10. The mole is defined as
A. 1/12 the mass of an atom of the isotope carbon-12.
B. the amount of a substance that contains as many elementary entities as the number of atoms in
12 g of the isotope carbon-12.
C. the mass of one atom of the isotope carbon-12.
D. the amount of a substance that contains as many nuclei as the number of nuclei in 12 g of the isotope carbon-12.
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