Physics Past Questions and Answers

Which of the following statements about the mouth piece of a telephone is correct? It converts sound energy into

The potential energy in an elastic string of force constant K which has been extended by X metres is expresses as

The engine of a train produces a force of 3000N when moving at 30.ms^-1. calculate the power of the engine

The velocity ratio of an inclined plane, inclines at an angle \(\theta\) to the horizontal can be expressed as

A block and tackle system has six pulleys. a force of 50N applied to it lifts a load of weight W. If the efficiency of the system is 40%, calculate W