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千千万万遍
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此套试卷由25道选择题以及3道大题组成
每道大题含有不同数量的小题
完整版下载链接见文末
Data:
Speed of light c =3.00 × 108m/s
Gravitational constant G =6.67 × 10−11N · m2kg2
Acceleration due to gravity g =9.80m/s2
Normal atmospheric pressure P0 =1.01 × 105Pa
Density of fresh water ρ =1.00 × 103kg/m3
Specific heat of water Cw = 4186 J/(kg · K)
Specific heat of ice Ci = 2050 J/(kg · K)
Latent heat of water Lw = 2260 kJ/kg
Latent heat of ice Li = 334 kJ/kg
Density of ice ρi = 916 kg/m3
Fundamental charge e =1.60 × 10−19C
Mass of electron me =9.11 × 10−31kg
Mass of proton mp =1.67 × 10−27kg
Planck’s constant h =6.63 × 10−34Js
Coulomb’s constant 1/(4πε0)=8.99 × 109 N · m2 /C2
Boltzmann’s constant k=1.38 × 10−23J/K
A.U. Astronomical Unit = 1.49598 ×1011m: The approximate distance from the Sun to the Earth.
Radius of the Earth RE =6.371 × 106m
Radius of the Sun RS =6.96 × 108m
Part A: Multiple Choice
1)A small block of mass m1 is released from rest at the top of a curve-shaped, frictionless wedge of mass m2 which sits on a frictionless horizontal surface as shown. When the block leaves the wedge its velocity is measured to be 4.00 m/s to the right as shown in the figure. If the mass of the block is doubled to become 2m1 , what can be said about the speed with which it leaves the wedge?
2)Consider the electric charges A, B, C shown in the figure below, where q is a positive number. Which answer correctly describes the magnitude of the net force experienced by the charges?
3)A long, straight wire carries a current that decreases linearly with time. What is the direction of the induced electric field outside the wire?
4)A car driven at a constant speed turns left. Which force makes the car turn?
5)A cyclist stops pedaling at a velocity v =36km/h and notices that her bike keeps moving for d = 500 m before it stops. The total mass of the bike, the biker and her camping equipment is m = 100 kg. What is the average combined force on the bicycle due to friction and drag?
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