Define the following terms as used in machines;i) Mechanical advantageii) Velocity ratio (4marks)b) state the law of conservation of energy (2marks)c) In a machine, the load moves 2m when the effort moves 8m. If an effort of 20N is used toraise a load of 60N, calculate the efficiency of the machine. (4marks)d) A man uses an inclined plane to lift a 60kg load through a vertical height of 5metres. Theinclined plane makes an angle of 30 o with the horizontal. If the efficiency of the inclinedplane is 80%.calculate thei) Effort needed to move the load up the inclined plane at a constant velocity.ii) Work done against friction in raising the load through the height of 5 metres. (takeg=10N/kg)