(a) Use the data in Table 1.1 to calculate the speed v. v = ................................................. m s–1 [2]

(b) Use your answer in (a) and the data in Table 1.1 to calculate the absolute uncertainty in the value of v. absolute uncertainty = ................................................. m s–1 [2] [Total: 4]

2 (a) Define acceleration. ................................................................................................................................................... .............................................................................................................................................. [1]

(i) Calculate the initial horizontal component vX of the velocity of the ball. vX = ................................................. m s–1 [1]

(ii) Show that the initial vertical component vY of the velocity of the ball is 8.5 m s–1. [2]

(iii) Calculate the time taken for the ball to reach its maximum height above the ground. time = .......................................................  s [2]

(c) (i) Calculate the maximum height above the ground of the ball in (b). maximum height = ...................................................... m [2] (ii) The maximum gravitational potential energy of the ball above the ground is 22 J. Calculate the mass of the ball. mass = .....................................................  kg [2] (d) A ball of greater mass is kicked with the same velocity as the ball in (b). Air resistance is still negligible. State and explain the effect, if any, of the increased mass on the time taken by the ball to reach its maximum height. ................................................................................................................................................... .............................................................................................................................................. [1] [Total: 13]