Page 53 - e book prim 611
P. 53
Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025
➢ When a bicycle goes down a slide, its
potential energy changes to kinetic energy.
➢ The bicycle stops after sometime because
there is a friction between tires of the bicycle
and the road.
➢ So, some of kinetic energy changes into
thermal energy due to friction.
• At the top of the track, the marble has
the most potential energy.
• As the marble moves down the track
the potential energy changes to
kinetic energy.
• As the marble moves along the track,
some kinetic energy changes into
thermal energy due to friction
between marble and track, that
decreases the speed of the marble,
so it doesn’t reach the end of the
track.
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