A wheel and an axle is used to raise a load whose weight is 800N when an effort of 250N is applied. If the radii of the wheel and axle are 800mm and 200mm respectively, the efficiency of the machine is

Similar Questions

The odor of a leaking gas is perceived at a distance from the source. This is made possible by the p...

Notes of the same frequency sounded on a guitar and trumpet may differ in I. loudness II. Pitch ...

Palm oil from a bottle flows out more easily after it has been heated because the ...

The difference of potential between the terminals of cells is 2.2 volts. When a 4ohm resistor is con...

An object is placed 30 cm in front of a concave mirror of focal length 20cm. Calculate the distance ...

Neutrons were discovered by ...

Which of the following physical quantities is correctly paired with it's corresponding S.I unit?...

Two spanners X and Y of lengths 15cm and 20cm respectively are used in turn to give a screw of pitch...

Which of the following may be used to explain a mirage? i. layers of air near the road surface ha...

In an elastic collision I. Energy is conserved II. Energy is decreased III. Energy is increased...