At the peak of the object's motion, the
velocity becomes zero, and the object momentarily stops before it starts to
fall back down. Gravity continues to act on the object throughout its motion.
The work done by gravity is given by:
where:
is the force due to gravity (equal to
),
is the displacement in the direction of
the force (which is the height reached at the peak).
Calculate the force due to gravity
Calculate the height at the peak
We can use the kinematic equation to find
the maximum height the object reaches:
where:
is the final velocity (0 m/s at the
peak),
is the initial velocity (10 m/s),
is the acceleration due to gravity (-10
m/s², since gravity acts downward),