Question

you want to lift a heavy box with a mass of 98 kg using the two pulley system as shown. with what minimum force do you have to pull down on the rope in order to lift the box at a constant velocity?

Answer 1

Gives

Mass of box (m)= 98 kg

According to newtons law for Y direction

$\Sigma F_y=2T-mg$

$\Sigma F_y=0$

Then the tension

$T=\frac{mg}{2}$

Put value

$T=\frac{98\times9.8}{2}=480.2N$

T=480.2N