JEE Main 2026 · 6 Apr · Shift 1 · Physics Q30

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PhysicsSingle correct+4 / -1Question 30 of 75

A lift of mass 1600 kg is supported by thick iron wire. If the maximum stress which the wire can withstand is $4\times10^8$ N/m² and its radius is 4 mm, then maximum acceleration the lift can take is ________ m/s².

(take $g=10$ m/s² and $\pi=3.14$ )

2.56

3.89

4.32

5.16

Answer and worked solution

Official answer: A

Maximum tension.
$T=4\times10^8\times3.14\times(4\times10^{-3})^2=20096\text{ N}.$

Acceleration. $T-mg=ma$ :
$a=\frac{20096}{1600}-10=2.56\text{ m/s}^2.$

(A)

Topics:Stress and strain Newton's laws

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JEE Main 2026 · 6 Apr · Shift 1, Physics question 30