A toy rocket is propelled straight upward from the ground and reaches a height H. After an elapsed time Δt, measured from the time the rocket was first fired off, the rocket has fallen back down to the ground, landing at the same spot from which it was launched. The magnitude of the average velocity of the rocket during this time is

Transcribed Image Text:

(а) zero (b) 2 At Δι H (с) At (d) 1 Н 2 Δι