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

Efficiency can be calculated using the formula:

Efficiency = (Output work / Input work) x 100%

First, we need to calculate the work done by the load and the work done by the effort.

Work done by the load = Force x Distance
Work done by the load = 2000 N x 4.9 m
Work done by the load = 9800 Joules

Work done by the effort = Force x Distance
Work done by the effort = 500 N x 1 m
Work done by the effort = 500 Joules

Now, we can calculate the efficiency:

Efficiency = (9800 / 500) x 100%
Efficiency = 19.6 x 100%
Efficiency = 19.6%

Therefore, the efficiency of the simple machine is 19.6%.