Initial velocity of elevator (Downward is taken negative.)
Acceleration of elevator ( upward is taken positive)
A) Final velocity of elevator
at time ,
at time ,
That is the elevator is slowing down.
B)
Net force on elevator in the vertical direction ,
Reading on scale
C ) Reading o the scale , so the reading on the scale stay the same.
D ) Elevator begins to accelerate downwards,
Reading on the scale decreases.
E ) To reading on the scale is zero.
Downward acceleration is
V. ELEVATOR REVIEW A man stands on a scale in an elevator. The elevator moves downwards...
A 78 kg man stands on a bathroom scale at the center of an elevator. As the elevator accelerates from rest downwards to -11.4 m/s in 3.04 s, what is the scale reading in Newtons?
A simple pendulum with a period s is attached to the ceiling of an elevator which is initially at rest. Calculate the period of oscillations when the elevator begins to accelerate upwards with acceleration . Calculate the period of oscillations when the elevator accelerates downwards with acceleration .
You are standing on a scale in an elevator initially at rest and the scale reads 71.2 kg. The elevator begins to ascend and accelerates at a rate of 3.57 m/s 2 . What would the scale read (in kg) when the elevator is moving upwards and accelerating?
A man weighs an apple with a spring scale attached to the ceiling of an elevator. At rest, the scale reads 0.9 N. If the scale then reads 1.5 N when the elevator accelerates upwards at a constant rate, find this acceleration.
A man weighs an apple with a spring scale attached to the ceiling of an elevator. At rest, the scale reads 0.9 N. If the scale then reads 1.5 N when the elevator accelerates upwards at a constant rate, find this acceleration.
If a person steps on a scale in an elevator that is accelerating at a rate 1.300 m/s^2 (negative means downward while positive means upwards) and sees a scale reading of 660.400 Newtons what would the scale read if the elevator were not moving?
A 68-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.77 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest. (a) What does the spring scale register before the elevator starts to move? N (b) What does the spring scale register during the first 0.77 s of the elevator's ascent?...
A man is standing on a scale inside an elevator. As the elevator starts to go up with an acceleration a, the scale reads 832 N. The mass of the man is m = 60 kg. (a) Which of the free body diagrams below displays all the forces acting on the man with the correct relative magnitudes and directions?
E. Suppose you are standing on the scale in the elevator and the elevator is accelerating downward with an acceleration smaller than 9.8 m/s2 i. Draw free-body diagrams of yourself, the scale, and the floor of the elevator where it interacts with the scale. ii. How must the magnitude of the force exerted by the scale on you compare with your own weight? iii. How must the reading on the scale compare with the reading you make when the elevator...
A 72 kg man stands on a bathroom scale in an elevator. Starting from rest at the top floor, the elevator descends, attaining its maximum speed of 1.20 m/s in 0.80 s. It travels with this constant speed for the next 5.00 s. The elevator then slows down for 1.50 s and comes to rest at ground level. a)What is the acceleration of the man during the first 0.80 s? Answer in units of m/s2 and use the upward direction...