Question
Why does a girl skateboarding on a half-pipe not remain in motion forever?
a
her energy is destroyed by the friction of the skateboard and the concrete
b
none of the above
c
her energy is used up
d
her energy is transformed into thermal energy from friction
a
her energy is destroyed by the friction of the skateboard and the concrete
b
none of the above
c
her energy is used up
d
her energy is transformed into thermal energy from friction
Answers
GPT-4o mini
The best answer to why a girl skating on a half-pipe does not remain in motion forever is:
**d. her energy is transformed into thermal energy from friction.**
As she skates, friction between the skateboard wheels and the surface of the half-pipe, as well as air resistance, acts on her and the skateboard, converting kinetic energy into thermal energy, which causes a loss of mechanical energy and eventually brings her to a stop.
**d. her energy is transformed into thermal energy from friction.**
As she skates, friction between the skateboard wheels and the surface of the half-pipe, as well as air resistance, acts on her and the skateboard, converting kinetic energy into thermal energy, which causes a loss of mechanical energy and eventually brings her to a stop.