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JAMB Physics 2019 Paper

Question : 77

Total: 100

^{-2}

Solution:

Concept:

At the highest point, the projectile’s kinetic energy is zero and its gravitational potential energy is given by

PE = mgh

Explanation:

Mass,

m = 4\ \mathrm{kg}

Height,

h = 40\ \mathrm{m}

Gravitational field strength,

g = 10\ \mathrm{ms^{-2}}

Potential energy,

PE = mgh

PE = 4 \times 10 \times 40

PE = 1600\ \mathrm{J}

Answer:

The potential energy at the highest point is

1600\ \mathrm{J}

, which is option B.

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