Physics - Grade 12 -2023 G.C

Grade 12 students can now access their exam results by visiting the Educational Assessment and Examination Services (EAES) website.

34. A 30 kg rigid object has a moment of inertia 45 kg m2 about its center of mass. What is the object's moment of inertia when it rotates through an axis 2 m a way and parallel to the axis through its center of mass?

  1. 180 kgm2
  2. 105 kgm2
  3. 90 kgm2
  4. 165 kgm2

35. Two coplanar forces acts on a uniform beam as shown in the figure below.
The moment of force on the beam is

  1. 30.0 N.m.
  2. 24.0 N.m.
  3. 48.0 N.m.
  4. 12.0 N.m.

36. Water flows at the rate of 500.0 cm3/s at small cross-section 5 cm2. The larger cross-section is 25 cm2. What is the ratio of the speed of the water at A1 to A2.

  1. 0.2
  2. 20
  3. 5
  4. 100

37. An ideal monoatomic gas expands adiabatically from an initial volume of 2 liters at a temperature of 300 K to 16 liters of volume. What is the final A temperature of the gas? (Use the ratio of specific heat capacity at constant pressure to that at constant volume to be 5/3.)

  1. 2400 k
  2. 1200 K
  3. 37.5 k
  4. 75 K

38. Consider a particle performing a circular motion around a circle of radius r, with an angular velocity ω and the particle's projection on the horizontal diameter of the circle (between points Q and R) as shown in the figure below?
Which one of the following statements is correct about the motion of the particle and its projection on QR

  1. QR demonstrates simple harmonic motion." >The projection of the particle on QR demonstrates simple harmonic motion.
  2. QR demonstrates motion with constant acceleration." >The projection of the particle on QR demonstrates motion with constant acceleration.
  3. QR swings between points Q and R was with constant speed." >The projection of the particle on QR swings between points Q and R was with constant speed.
  4. The circular motion of the particle can be taken as a simple harmonic motion.

We have provided these questions from previous years grade 12 Ethiopian Secondary School Leaving Certificate Examination (ESSLCE) exams with the sole purpose of assisting students in their studies and preparations for upcoming exams. Please be aware that these questions are not indicative of future exam content. Good luck with your studies!

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