Question

An elevator brimming with tourists has a mass of 1900 kg. The
elevator accelerates upward (in the positive direction) from rest
at a rate of 1.8 m/s^{2} for 2.5 s. The elevator continues
upward at constant velocity for 8.2 s. The elevator experiences a
negative acceleration at a rate of 0.45 m/s^{2} for 2.1
s.

How far, in meters, has the elevator moved above its original starting point?

Answer #1

An elevator filled with passengers has a mass of 1583 kg.
(a) The elevator accelerates upward from rest at a rate of 1.20
m/s2 for 2.00 s. Calculate the tension in the cable (in
N) supporting the elevator.
(b)The elevator continues upward at constant velocity for 9.22
s. What is the tension in the cable (in N) during this time?
(c)The elevator decelerates at a rate of 0.600 m/s2
for 4.00 s. What is the tension in the cable (in...

(a) An elevator of mass m moving upward has two forces
acting on it: the upward force of tension in the cable and the
downward force due to gravity. When the elevator is accelerating
upward, which is greater, T or w?
(b) When the elevator is moving at a constant velocity upward,
which is greater, T or w?
(c) When the elevator is moving upward, but the acceleration is
downward, which is greater, T or w?
(d) Let the elevator...

A 1200 kg elevator accelerates upward at 1.30 m/s2 for 11.0 m ,
starting from rest.
A.How much work does gravity do on the elevator? Express your
answer with the appropriate units.
B. How much work does the tension in the elevator cable do on
the elevator? Express your answer with the appropriate units.
C.How much work does the tension in the elevator cable do on the
elevator? Express your answer with the appropriate units.
D. What is the speed...

You are in an elevator which accelerates upward. You are
standing on the scale. Your normal weight is w = 645 N .
A) Make a free-body diagram of your body if the elevator has an
acceleration a = 2.32 m/s2 .
B)Find the scale reading with the conditions given in part
(A)?
C)If you start holding a 3.90 kgkg package by a light vertical
string, make a free-body diagram of the package.
Draw the force vectors with their tails...

A passenger in an elevator has a mass of 100 kg. Calculate the
force, in newtons, exerted on the passenger by the
elevator, if the elevator is [10 marks]
a) at rest. b) moving with an upward acceleration of 30
cm/s?.
c) moving with a downward acceleration of 15 cm/s? d) moving
upward with a uniform velocity of 15 cm/s?
e) falling freely (the cable breaks)

A certain elevator cab has a total run of 192 m and a maximum
speed is 315 m/min, and it accelerates from rest and then back to
rest at 1.10 m/s2. (a) How far does the
cab move while accelerating to full speed from rest?
(b) How long does it take to make the nonstop 192
m run, starting and ending at rest?

A rocket, initially at rest on the ground, accelerates straight
upward from rest with constant acceleration 34.3 m/s2 . The
acceleration period lasts for time 8.00 s until the fuel is
exhausted. After that, the rocket is in free fall. Find the maximum
height ymax reached by the rocket. Ignore air resistance and assume
a constant acceleration due to gravity equal to 9.80 m/s2 .

A rocket, initially at rest on the ground, accelerates straight
upward from rest with constant acceleration 39.2 m/s2 . The
acceleration period lasts for time 9.00 s until the fuel is
exhausted. After that, the rocket is in free fall.
Find the maximum height ymax reached by the rocket. Ignore air
resistance and assume a constant acceleration due to gravity equal
to 9.80 m/s2 .

A(n) 603 kg elevator starts from rest. It moves upward for 3.88
s with a constant acceleration until it reaches its cruising speed
of 1.78 m/s. The acceleration of gravity is 9.8 m/s 2 . Find the
average power delivered by the elevator motor during this period.
Answer in units of kW.

an elevator of mass m = 400 kg starts from rest and is lowered
to the ground by a rope in three stages. During the first second,
it accelerates at 3 m/s^2 downward, then continues at a constant
speed for six seconds, then slows down to a rest at 1 m/s^2 for
three seconds.
a) find the initial height of the elevator.
b) find the total work done by the elevator by the rope.
c) find the average power done...

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