【全部】 - 學士後西醫物理及化學2024~2020難度:(71~80)-阿摩線上測驗
惠利剛剛做了阿摩測驗,考了10分
4. A block of mass m sliding down an incline at constant speed is initially at a height h above the ground, as shown in the figure. The
coefficient of kinetic friction between the mass and the incline is μ.If the mass continues to slide down the incline at a constant
speed, how much energy is dissipated by friction by the time the mass reaches the bottom of the incline?
(A) mgh/µ
(B) mgh
(C) µmgh/ sin θ
(D) mgh sin θ
(E) 0
13. Which of the following is correct for visible light through a prism?
(A) a and d
(B) c and b
(C) c and d
(D) a and b
(E) None of these
38. A 2-kg block slides down a frictionless incline from point A to point
B. A force (magnitude P = 3 N) acts on the block between A and B,
as shown in the figure Points A and B are 2 m apart. If the kinetic
energy of the block at A is 10 J, what is the kinetic energy of the
block at B? (Gravitational acceleration g = 10 m/s2
)
(A) 17 J
(B) 20 J
(C) 24 J
(D) 27 J
(E) 37 J