Apparatus and Materials1 x metre rule1 x knife-edge1 x 100g mass1 x 50g massPROCEDURE(a) Balance the metre rule on the knife-edge. Determine the distance d of the centre of mass of themetre rule from the left end of the metre rule. Give your answer in centimetres.d = ………………………………….. [1

23. Which of the following instruments is a concave, spring-steel blade ranging from 1/4" to 1" wide and 6 to about 300 feet in length?*A. compassB. dividerC. protractorD. tape ruler24. If one (1) inch is equivalent to 2.54 cm, what is the answer if we convert 25 inches to centimeters?*A. 53.5 cmB. 63.5 cmC. 73.5 cmD. 83.5 cm25. Which of the following Metric measurements is equivalent to 43 inches?*A. 109.22 cmB. 134.8 cmC. 151.3 cmD. 167.4 cm26. What type of  T-square has one fixed and one adjustable head and used only for occasional drawing?*A. adjustableB. disposableC. fixedD. removable27.    Which of the following type of pencils are used where extreme accuracy is required especially working on graphs, diagrams, and charts?*A. hardB. mediumC. mechanicalD. soft28.  To protect the rest of the drawing when clearing up smudges, unnecessary pencil lines, and other erasures, which tool should be used?*A. eraserB. erasing shieldC. correction liquidD. correction tape29.  Which of the following is used to measure dimensions?*A. cuttingB. liningC. measuringD. testing30. Which of the following English measurements is equivalent to 15 meters?*A. 590.551 mB. 593.545 mC. 602.732 mD. 602.833 m31. What line is a line drawn downward?*A. curvedB. horizontalC. inclinedD. vertical32. Which of the following  is an inclined strokes diagonally drawn downward?*A. curvedB. horizontalC. inclinedD. vertical33. Which line is a thin line that shows the surface that has been cut?*A. centerB. hiddenC. sectionD. short-break34. What  line is drawn from left to right for a right-handed individual?*A. curvedB. horizontalC. inclinedD. vertical35. Which of the following lines is a thick line that represents the visible edges or outline of the object.*A. centerB. hiddenC. sectionD. visible36. What curved stroke is drawn downward for either right-handed or left-handed?*A. curvedB. horizontalC. inclinedD. vertical37. Which of the following alphabet of lines refers to a thick line drawn in freehand to show details that a part has been cut off?*A. centerB. hiddenC. sectionD. short-break38. Which of the following lines is a short inclined thin line with an arrowhead at the end and short horizontal line on the other end?*A. centerB. hiddenC. leaderD. visible39. What line has two long dashes and a short dash drawn alternately with a gap of at least 2 mm in between?*A. centerB. hiddenC. sectionD. visible40. How do you describe a dimension line?*A. This is also known as the limiting line.B. This is a thin line that extends from the object in order to show dimension limits.C. This line shows position/s of part of an object that moves; drawn by two short dashes and one long dash.D. This is a thin line with an arrowhead at one end and it is used to indicate the measurements of the object.

My Practice Time 1 1. Convert into centimetres. a. 2 m b. 4 m c. 90 m e. 15 m 20 cm f 6 m 50 cm g. 12 m 9 cm d. 70 m 25 cm b. 8 m 50 cm 2. Convert the following into m and cm. a. 400 cm b. 306 cm c. 129 cm d. 256 cm e. 781 cm f. 244 cm g. 888 cm h. 413 cm 3. How many more centimetres are required to make a metre? a. 82 cm 8 cm b. 57 cm 43cm c. 9 cm e. 23 cm 91cm d. 84 cm 16 cm 77 cm f. 49 cm 51 cm

The whole length of a metre scale is divided into500 equal parts then the smallest measurementthat can be measured by using the scale is _______.(a) 0.5 m (b) 0.005 m(c) 50 mm (d) 2 mm

A metre rule is used to measure a length. Which reading is shown to the nearest millimetre?0.8 m0.82 m0.821 m0.8212 m

Q 1: A student is finding the weight of a metre rule using the apparatus shown in Figure 1. Figure 1 (not to scale)  He places the load P = 1.00 N on the metre rule at the 5.0 cm mark.  He places the metre rule on the pivot at the 45.0 cm mark.  He places load Q = 0.80 N on the rule and adjusts its position so that the metre rule is as near as possible to being balanced. He measures  the distance x (between the centre of load P and the pivot)  the distance y (between the centre of load Q to the pivot) He repeats the procedure, placing the load P at the 10.0 cm mark, at the 15.0 cm mark, at the 20.0 cm mark and at the 25.0 cm mark. The readings are shown in Table. Table 1 x ( ) y ( ) A = P x ( ) B = Q y ( ) 40.0 42.5 35.0 36.0 30.0 30.0 25.0 24.0 20.0 17.5 (i) In the table 1: (a) Complete the column headings/units. [1 ] 5 (b) Complete the column A = P x. [1] (c) Complete the column B = Q y. [1] (ii) Plot a graph of A (y-axis) against B (x-axis). Start both axes at the origin (0,0). [1 ] (iii) Using the graph, determine the vertical intercept Y (the value of A, when B = 0 N cm). Show clearly on the graph how you obtained this value. Y = [1] (iv) Calculate the weight W of the metre rule using the equation W = Y/z , where z = 5.0 cm. W = [1] 6 (v) Suggest one practical reason why it is difficult to obtain exact results with this experiment. [1] (vi) The student uses an accurate electronic balance to obtain a second value for the weight of the metre rule. weight obtained on the balance = 1.24 N State and justify whether the two values for the weight agree within the limits of experimental accuracy. Statement [1 ] Justification [1 ]