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The total mass of a lift and passengers is 1000 kg. The variation of velocity with me is given in the graph with velocity being positive in the upward direction. (a) What is the tension in the rope pulling the left at t = 1 sec. (b) What is the tension at t = 3 sec. (c) What is the tension at t = 9 sec.



The total mass of a lift and passengers is 1000 kg. The variation of velocity with me is given in the graph with velocity being positive in the upward direction.


 


(a)    What is the tension in the rope pulling the left at t = 1 sec.


(b)    What is the tension at t = 3 sec.


(c)    What is the tension at t = 9 sec.


 

Grade:11

1 Answers

Hrishant Goswami
343 Points
7 years ago

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        General equation is T = mg + m

(a)    t = 1 sec            a = 1 m/s2

T = 1000(10.8) = 10800 N (t – 1 sec.)

(b)    t = 3 sec            a = 0

T = 98000 N

(c)    t = 3 sec            a = –1m/s2

T = 8800N

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