CAIE Physics (9702)

In this experiment, you will investigate the motion of a pendulum. You have been provided with a cylinder and a pendulum. cylinder string bob adhesive putty The distance between P and the centre of the bob is L. Adjust the adhesive putty and string so that L is approximately 45 cm. L = [1] clamp boss bench standbob cylinder T =

Change L by attaching a different point on the string to the cylinder and determine T. Repeat until you have six sets of values of L and T. and L in your table. [9] on the y-axis against L on the x-axis.

Draw the straight line of best fit.

Determine the gradient and y-intercept of this line. gradient = y-intercept =

It is suggested that the quantities T and L are related by the equation = EL+ F where E and F are constants. Using your answers in (d)(iii), determine the values of E and F. Give appropriate units. E = F = [2] [Total: 20] You may not need to use all of the materials provided.

In this experiment, you will investigate the equilibrium of a card. You have been provided with a card.

The card has one edge of length h and another edge of length x, as shown in Fig. 2.1. card

Measure and record h and x. h = cm x = cm

Calculate the area A of the card, where A = hx + A = cm

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Justify the number of significant figures that you have given for your value of A. hole nail bench stand boss The three lines cross at distances c and d from the two edges of the card shown in Fig. 2.4. hole line Measure and record c and d. c = cm d = cm

Estimate the percentage uncertainty in your value of c. Show your working. percentage uncertainty = % [1] x = cm

Repeat

. A = cm c = cm d = cm

It is suggested that the relationship between c, A, h and x is cA = where k is a constant. Using your data, calculate two values of k. first value of k = second value of k =

It is suggested that the percentage uncertainty in the values of k is 5%. Using this uncertainty, explain whether your results support the relationship in

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(i) Describe four sources of uncertainty or limitations of the procedure for this experiment. For any uncertainties in measurement that you describe, you should state the quantity being measured and a reason for the uncertainty. 1 2 3 4

Describe four improvements that could be made to this experiment. You may suggest the use of other apparatus or different procedures. 1 2 3 4 [4] [Total: 20]