physics p2.pdf

535/2 PHYSICS Paper 2 New Lower Secondary Curriculum SCORING GUIDE 2024 UGANDA NATIONAL EXAMINATIONS BOARD PHYSICS Uganda Certificate of Education Paper 2 Practical © 2024 Uganda National Examinations Board Turn Over corresponding values of y. 6. Possible sources of errors: - Parallax errors. - Working surface not smooth/flat /rough enough. - Air resistance / wind. to ascertain how much the student will earn. EXPECTED RESPONSES: 1. Aim: To determine the mass of the empty bottle provided in order 2. Variable: Distances from the pivot to the masses. (Independent Vs dependent). Controlled variables( depends on the type of the Expt). 3. Hypothesis: The mass of the bottle provided is not between (10 – 20) g or is between (10 – 20) g. 4. List of Apparatus: - Expected list. - Wooden block / Retort stand. - Knife Edge / Clamp. - Metre rule. - 2 pieces of thread /3 pieces of thread. - Known mass. - Empty bottle 5. The metre rule is balanced on a knife edge and the point of balance noted and recorded, G. A known mass is hung/suspended from one end of the metre rule at a known distance x from the G. 2 The bottle whose mass is required is suspended from the other end of the metre rule and its position from G is adjusted until the metre rule balances again at x. The distance y of the bottle from G is recorded. The experiment is repeated for atleast 2 more values of x to obtain 535/2 - PHYSICS SAMPLE PAPER SCORING GUIDE 3 END x versus y, Slope = 7. Precautionary measures: Correct use of in