Question

A rocket rises vertically, from rest, with an acceleration of 3.2 m/s2m/s2 until it runs out of fuel at an altitude of 800 mm . After this point, its acceleration is that of gravity, downward.

1) What is the velocity of the rocket when it runs out of fuel?

2) How long does it take to reach this point?

3) What maximum altitude does the rocket reach?

4) How much time (total) does it take to reach maximum altitude?

5) With what velocity does it strike the Earth?

6) How long (total) is it in the air?

Answer #1

A rocket is fired from its launch pad with
acceleration 9.0
m/s2.
The
rocket
travels vertically upward for 13.0 s at which time
all the fuel is burned
out.
Calculate the total time the rocket is in the air, from launch to
falling
back to the
ground.

A model rocket is fired vertically from the ground with a
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fuel is exhausted. What is the maximum height (in m) reached by the
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A rocket is launched vertically up with no initial velocity.
Propulsion is provided by the ejection of mass with constant
velocity of ejection u = 66.0 m/s relative to the rocket and at a
constant rate so determined that the initial acceleration is zero.
The mass of fuel that can be ejected is 55.0% of the total mass at
launch. Assuming constant gravitational acceleration, how long does
it take the rocket to achieve maximum upward acceleration?

A small rocket is launched vertically from the ground and
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after 4 seconds and the rocket moves under the influence of gravity
until it returns to the ground. You may neglect air resistance.
Draw the position, velocity, and acceleration vs. time curves for
the entire flight from t=0 to t=9.5 s. Take the +y axis to be
upward.
A) what is the Position vs. Time graph?
B) What is...

A rocket blasts off vertically from rest on the launch pad with
a constant upward acceleration of 2.90 m/s2 m / s 2 . At 20.0 s s
after blastoff, the engines suddenly fail, and the rocket begins
free fall.
Find the magnitude of the rocket's velocity at its highest
point.
Find the magnitude of the rocket's acceleration at its highest
point.

you
launch a model rocket from ground level. it moves directly upward
with a constant acceleration of 66.5 m/s^2 for 1.20 seconds, at
which point it runs out of fuel. Assuming air resistance on the
rocket is negligible, what is the maximum altitude (above the
ground) achieved by the rocket?

A rocket blasts off vertically from rest on the launch pad with
a constant upward acceleration of 2.30 m/s2 . At 20.0 s after
blastoff, the engines suddenly fail, and the rocket begins free
fall.
How long after it was launched will the rocket fall back to the
launch pad?

A kids rocket is fired from rest from the ground (y=0) at time
t1=0s. As the rocket fuel is burning its fuel it moves
vertically upward with constant acceleation of
+4.25m/s2. At t2=12s all fuel is used up and
rocket is in freefall and air resistance can be neglected in this
case.
what is the maximum height of rocket with respect to ground?
Also how long after being launched does the rocket return to the
ground? And what is the...

A model rocket blasts off and moves upward with an acceleration
of 12 m/s2 until it reaches a height of 29 m, at which
point its engine shuts off and it continues its flight in free
fall. Use g = 9.81 m/s2.
a. What is the maximum height attained by the rockets?
b. What is the speed of the rocket just before it hits the
ground?
c. What is the total duration of the rocket's flight?

A model rocket is launched straight upward with an initial speed
of 59.0 m/s. It accelerates with a constant upward acceleration of
2.50 m/s2 until its engines stop at an altitude of 160
m.
(a) What can you say about the motion of the rocket after its
engines stop?
(b) What is the maximum height reached by the rocket?
(c) How long after liftoff does the rocket reach its maximum
height?
(d) How long is the rocket in the air?

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