An object is hung from a spring balance attached to the ceiling ofan elevator ca

Question

An object is hung from a spring balance attached to the ceiling ofan elevator cab. The balance reads 65 Nwhen the elevator is standing still. (a) What is the reading when the elevator ismoving upward with a constant speed of 7.4m/s?
1 N

(b) What is the reading when the elevator is moving upward with aspeed of 7.4 m/s while decelerating at arate of 1.7 m/s2?
2 N (a) What is the reading when the elevator ismoving upward with a constant speed of 7.4m/s?
1 N

(b) What is the reading when the elevator is moving upward with aspeed of 7.4 m/s while decelerating at arate of 1.7 m/s2?
2 N

Explanation / Answer

. 01.   Part A: 02.      Since the elevator is inconstant motion, the external forces are in equilibrium,therefore: 65.0Newtons. . 03.   Part B: 04.      While decelerating an upwardmoving elevator cab, there is a Force acting on the object oppositethe direction of gravity. 05.      W = object's weight =(mass)*(acceleration) = [(65 Newtons)/(9.8 m/s2)]*(9.8m/s2 - 1.7 m/s2) = 53.7 Newtons .

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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