Laws Of Motion Question 272

Question: A mass of 1 kg is suspended by a thread. It is

(i) lifted up with an acceleration 4.9m/s2 , (ii) Lowered with an acceleration4.9m/s2 . The ratio of the tensions is

Options:

A) 3:1

B) 1:2

C) 1:3

D) 2:1

Show Answer

Answer:

Correct Answer: A

Solution:

[a] In case (i) we have T1(1×g)=1×4.9

T1=9.8+4.9=14.7 N In case (ii) ,1×gT2=1×4.9

T2=9.84.9=4.9 NT1T2=14.74.9=31



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