1.7. Which statement best describes the PE-KE transformations for a javelin,
starting from the instant the javelin leaves the thrower's hand until it hits the
ground.
Initial PE is transformed to KE until the javelin reaches the high point of its
arc. On the way back down, KE is transformed into PE. At every point in the
flight, mechanical energy is being transformed into heat energy.
b. Initial PE is transformed to KE until the javelin reaches the high point of its
arc. On the way back down, there is no transformation of mechanical
energy. At every point in the flight, mechanical energy is being transformed
into heat energy.
Page 2​