Question

2. A model rocket is launched from the ground with an initial velocity of 288 ft/sec.
c. How long will it take the rocket to reach its maximum height? Show all work in the space provided.


Initial velocity u = 288ft/s
Final velocity v = 0 (at max. height it is instantaneously stationary)
Acceleration = -32ft/s (negative as downwards)

a = (v-u)/t
t = (v-u)/a
. = (0-288)/-32
. = 9s

How long would it take the rocket to return to Earth from the time it was launched if the parachute deployed?

Answer 1

@phi @welshfella

Answer 2

@welshfella ?

Answer 3

Maybe you have typed this wrong?

Should it read 'if NO parachute is deployed'?

Unless oyu have information about a parachute you cannot answer it as written.

With NO parachute
u=0
a=32ft s^-2
you need to find the height , from the first part (s=ut +0.5at^2)

Then calculate time to fall
s=0.5at^2

Answer 4

Oops. I did mean no parachute.