The elevator A starts from rest on the ground and is pulled upwards at constant

Question

The elevator A starts from rest on the ground and is pulled upwards at constant acceleration

during 3 seconds to reach a velocity of 1.2 m/s; after that, the

velocity remains constant. Determine:

a) Determine the acceleration of the elevator and the

distance h it travels during the acceleration period.

b) Find the equations of the ropes. Hint: take a point on

the rope next to the motor and assume it moves to the

right on an infinite straight line.

c) What is the constant velocity that the motor M pulls

the rope after the acceleration period?

The elevator A starts from rest on the ground and is pulled upwards at constant acceleration during 3 seconds to reach a velocity of 1.2 m/s; after that, the velocity remains constant. Determine: Determine the acceleration of the elevator and the distance h it travels during the acceleration period. Find the equations of the ropes. Hint: take a point on the rope next to the motor and assume it moves to the right on an infinite straight line. What is the constant velocity that the motor M pulls the rope after the acceleration period?

Explanation / Answer

a) v=u+a*t ;

1.2=0+a*3 ;

a=0.4 m/s^2 ;

b) suppose i pull A x downwards then motor has to release 3x length os rope ;

so Va=3*Vm ;

c)Vm=Va/3=0.4 m/s

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.