IB SL Physics Poorly Answered Questions 1

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Below are 6 questions encountered in IB SL Physics that are poorly answered. Can you do them?

  1. A motor is used to lift a load by a rope passing over a pulley. The output power of the battery supplying the motor is 60 W. If in a time interval of 2.0 min the load gains 3.0 kJ of energy and friction in the pulley releases 0.5 kJ of energy, determine the efficiency of the motor. Neglect air resistance.
  2. A stationary closed vertical cylinder of mass M, cross sectional area A and length L contains N particles of an ideal gas at a kelvin temperature T and pressure P. The cylinder sits on an digital balance. Determine an expression for the reading on the balance.
  3. A particle is moving in SHM on a spring with total energy E on a smooth horizontal table. The amplitude of the motion is x0. Determine, in terms of E only, the work done by the spring when the extension of the spring changes from 3x0/4 to x0/2.
  4. Sketch a graph showing the speed of a particle moving in SHM in terms of the displacement from the equilibrium point.
  5. A buoy floating in the ocean moves in simple harmonic motion of period 20 s. Which of the following energy resources can cause this oscillation? tidal motion, wind energy, solar energy.
  6. One ampere is now defined using which of the following natural constants? e, h, c, kB, fCs, NA, Kcd .