A-LevelPhysicsWork, energy and power9702/12 · May/June 2013 · Q151 Mark
A ball is thrown vertically upwards. Neglecting air resistance, which statement is correct?
AThe kinetic energy of the ball is greatest at the greatest height attained.
BBy the principle of conservation of energy, the total energy of the ball is constant throughout
its motion.
CBy the principle of conservation of momentum, the momentum of the ball is constant
throughout its motion.
DThe potential energy of the ball increases uniformly with time during its ascent.
✓ Correct answer
B: By the principle of conservation of energy, the total energy of the ball is constant throughout its motion.
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