$A b o d y h a n g s f r o m a s p r i n g b a l a n c e s u p p o r t e d f r o m t h e f r o m t h e c e i l i n g o f a n e l e v a t o r . I f t h e e l e v a t o r h a s a n u p w a r d a c c e l e r a t i o n o f 2.5 m / s^{2} a n d t h e b a l a n c e r e a d s 50 N, w h a t i s t h e t r u e w e i g h t o f t h e b o d y ?$

20 N

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30 N

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40 N

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50 N

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Solution

The correct option is C
40 N

$R e a d i n g i n t h e s p r i n g b a l a n c e i s e q u a l t h e t e n s i o n i n t h e s p r i n g = 50 N . A s t h e e l e v a t o r i s a c c e l a r a t i n g i n u p w a r d d i r e c t i o n w i t h 2.45 m / s^{2} = \frac{g}{4} . T - m g = m a 50 - m g = m (\frac{g}{4}) m g = 40 N$

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Similar questions

Q. A body hangs from a spring balance supported from the roof of the elevator, the balance reads

50 N

when the elevator has an upward acceleration of

2.5 {m/s}^{2}

. What is the true weight of the body?

(

Take

g

10 {m/s}^{2})

$A b o d y h a n g s f r o m a s p r i n g b a l a n c e s u p p o r t e d f r o m t h e f r o m t h e c e i l i n g o f a n e l e v a t o r . I f t h e e l e v a t o r h a s a n u p w a r d a c c e l e r a t i o n o f 2.5 m / s^{2} a n d t h e b a l a n c e r e a d s 50 N, w h a t i s t h e t r u e w e i g h t o f t h e b o d y ?$