JPJC 2026 Projectile Assignment

Kinematics Assignment 2026/JPJC/PHYSICS/9478 1 JURONG PIONEER JUNIOR COLLEGE 9478 H2 PHYSICS PROJECTILE MOTION ASSIGNMENT Data: g = 9.81 m s−2 Formulae: s = ut + 1 2 at2 ; v2 = u2 + 2as 1 A stone thrown horizontally from the top of a vertical cliff with velocity 10.0 m s−1 is observed to strike a soft ground at a distance of 50.0 m from the base of the cliff. Determine (a) the height of the cliff, [2] (b) the velocity at which the stone strikes the ground, stating its direction clearly. [3] 2 A footballer standing near the centre of the field kicks a ball with a velocity of 20.0 m s−1 at an angle of 37° above the horizontal. (a) Assuming that the ball was propelled into the air when the footballer’s foot was at a height of 0.200 m above the ground, calculate the horizontal distance the football travels if it hits a goal post bar at a height of 2.44 m. [4]

Kinematics Assignment 2026/JPJC/PHYSICS/9478 2 (b) Calculate the maximum height reached by the ball. [2] (c) Calculate the velocity of the ball when it hits the bar. [3] (d) Sketch on the same diagram the path taken by the ball if there is (i) no air resistance and (ii) a large air resistance. [2] (e) Sketch on the same graph the accleration-time graph of the ball if there is (i) no air resistance and (ii) a large air resistance. [2]