Simple machine b has to be used to pull the packing case of 2000newtom into the car by an effort of 500newton , distance moved by load is 4.9m and distance moved by effort 1m?

To calculate the mechanical advantage of machine B, we can use the formula:

Mechanical Advantage = Load Distance / Effort Distance

In this case, the load distance is 4.9m and the effort distance is 1m.

Mechanical Advantage = 4.9m / 1m
Mechanical Advantage = 4.9

Therefore, the mechanical advantage of machine B is 4.9. This means that the machine can multiply the input force (effort) by 4.9 to lift the load.