2. A lever has efficiency 60% and mechanical advantage 4, then (i) Calculate effort require to lift 1000 N load. [250 N]
(ii) Calculate velocity ratio of the lever. [VR = = 6.66]
(iii) Find out output work to turn load up to 20 m. [20,000 Nm]

Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

Asatellite with an orbital period of exactly 24.0 h is always positioned over the same spot on earth. this is known as a geosynchronous orbit. television,communication, and weather satellites use geosynchronous orbits. at what distance would a satellite have to orbit earth in order to have a geosynchronous orbit?