Question

A mass of 790 kg is hanging from a crane (neglect the mass of the cable and the hook). While the mass is being lowered, it is speeding up with 2.7 m/s2. What is the tension on the cable

Answer 1

Answer:

Explanation:

Given

mass of object hanging from crane is $m=790\ kg$

mass is speeding up with $a=2.7\ m/s^2$

If T is the Tension in the cable then

$mg-T=ma$

$T=mg-ma$

$T=m(g-a)$

$T=790\times (9.8-2.7)$

$T=790\times 7.1$

$T=5609\ N$