A block and tackle is used to raise a load of 250N through a vertical distance of 30m. What is the efficiency of the system if the work done against friction is 1500J?

Similar Questions

A stone is dropped from the top of a tower of height 11 .25m. Calculate the time it will take to rea...

Which of the following correctly explain(s) why a green leaf appears green in bright day light? i...

Uranium of atom number 92 and mass number 238 emits an alpha particle from its nucleus. The new nucl...

Determine the inductive reactance when a 30.0mH inductor with a negligible resistance is connected t...

\(500cm^{-3}\) of a gas is collected at 0°C and at a pressure of 72cm of mercury. What is the volum...

From the diagram above, determine the value of the resistance X ...

A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far fro...

The particles emitted when \( ^{39}_{19}K \text{ decay to } ^{39}_{19}K \) is...

I. Density of the liquid. II. Acceleration due to gravity. III. Type of container of the liquid. ...

As a bicycle Tyre was being pumped up, it was noticed that contrary to Boyle's law the volume in...