A spring is suspended from a fixed point and a force is applied. The position of a pointer attachedto the bottom of the spring against a vertical ruler is recorded.Before the force is applied, the position of the pointer is (225  2) mm.After the force is applied, the position of the pointer is (250  2) mm.The extension of the spring is determined.What is the percentage uncertainty in the extension?A 1.6% B 1.8% C 8.0% D 16%

In an experiment to determine the acceleration of free fall g, the time t taken for a ball to fallthrough distance s is measured. The percentage uncertainty in the measurement of s is 2%. Thepercentage uncertainty in the measurement of t is 3%.The value of g is determined using the equation shown.22tsg What is the percentage uncertainty in the calculated value of g?A 1% B 5% C 8% D 11%

Q 2: A student is carrying out an experiment to determine the time period of mass-attached to aspring using the setup as shown in the figure 2. Figure 2 He adjusted the position of pointer at 0.0 cm when there is no load suspended with the spring. When a 100 g mass is suspended with the spring, then the new position is shown in the figure. (i) What is the value of force that 100 g of mass exerts on the spring? [1 ] 7 Force = N (ii) What is the extension in the spring? [1] Extension = cm (iii) What is the value of spring constant k? [1 ] k = (iv) What is the time period of mass-attached to the spring if the mass is pushed downward and left to oscillate? [1.5 ] T = (v) Using the result of part (iv), find frequency of the oscillations. [1.5 ] f =

For an experiment in this unit, you measure the time of a ball falling from rest as 3.4 ± 0.2 s and you want to calculate the distance the ball has fallen during that time, where you are taking the acceleration due to gravity as a = 9.8 ± 0.1 ms-2. What is the absolute uncertainty (to 1 sig fig) in the distance, calculated from the given values? Question 10) Select one: a. 4 m b. 0.5 m c. 7 m d. 6 m e. 0.3 m

Four measurements of length are shown on the ruler below.0 10 20 30 40 50 60 70 80 90 100A B C Da What length is indicated by each letter? Answer to the nearest millimetre.b What is the precision or limit of reading?c What the largest possible absolute error?d What is the upper and lower bound for each measurement?e Calculate the relative error, correct to three decimal places, for each measurement.f Calculate the percentage error, correct to one decimal place, for each measuremen

How is the extension of the spring measured in the experiment?2 marksIn millimetersIn metersIn inchesIn centimeters