February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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17Energy Work Power EfficiencyMedium1 mark
A small ball is projected into the air from horizontal ground. The diagram shows part of the path of the ball.
path of a small ball launched from point X on horizontal ground, curving up and forward through the air to point Y, which is a vertical height of 8.8 m above the ground
The ball leaves the ground at point X with a kinetic energy of 8.0 J. A short time later, the ball is at point Y where it has a kinetic energy of 3.5 J. Point Y is at a vertical height of 8.8 m above the ground. Air resistance is negligible. What is the mass of the ball?