Q2. A certain machine is used to lift a load of 500N when an effort of 50N is applied to the machine the load is raised by 10m and effort is moved by 60m that is the efficiency of the machine? (1. sp)

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.