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.

44. A boy in a journey covers his route by travelling 3.0 km east and 4.0 km north. What is the magnitude of his resultant displacement?

  1. 5.0 km
  2. 1.0 km
  3. 7.0 km
  4. 2.7 km

45. The graph given below shows the velocity of a man travelling on a motorcycle as a function of time.
Which one of the following statements is correct about the velocity-time graph?

  1. The displacement during the time interval from t = 6 s to t = 14 s is equal to the area of region II minus the area of region III.
  2. The displacement during the time intervals t = 0 to t = 6 s is equal to the area under the velocity-time graph in the given interval.
  3. The acceleration during the time interval from t = 6 s to t = 10 equal to the gradient of the curve in the given interval and it is negative.
  4. The acceleration in the first 6 s is equal to the gradient of the curve in the given interval and it is positive.

46. A car of mass 1.50 x 103 kg collides with a wall and rebounds. The initial and final velocities of the car are vi = -15.0 m/s and Vf = 2.60 m/s, respectively. If the collision lasts for 0.15 s, what is the magnitude of the average force exerted on the car?

  1. 2.60 x 104 N
  2. 3.96 x 103 N
  3. 2.64 x 104 N
  4. 1.76 x 105 N

47. Starting from rest, a block of mass 5.0 kg slides 2.5 m down a rough 37⁰ incline. The coefficient of kinetic friction between the block and the incline is μ = 0.44. What is the work done by the friction force on block?

  1. -75.00 J
  2. -18.92 J
  3. -44.00 J
  4. -59.00 J

48. An inclined plane is 20 m long and is inclined at an angle of 15⁰ to the horizontal. If the effort required to push a block of weight 3,000 N up the slope is 900 N, what is the efficiency of the inclined plane?

  1. 100 %
  2. 86.7 %
  3. 25.9 %
  4. 30.0 %

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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