Question

An elevator and its load have a combined mass of 1800kg. Determine The tension in supporting cable when it is moving down with a retardation of 2$m/s^2$? 1take g = 10 $m/s^2$

• A. 14400 N
• B. 21600 N
• C. 1800 N
• D. 20000 N

Answer 1

The correct option is B 21600 N

From the $FBD$ of lift,

$T-Mg=Ma$

$\Rightarrow T=M(a+g)$

From given values,

$T=1800\times (10+2)=21600N$

$\Rightarrow T=21.6KN$ Ans