A machine having efficiency of 40% is used to lift a load of 1200N threat a height of 10M and of 30M in 5 second. calculate. A, Effort. B, mechanical advantage C, velocity ratio D, input work. E, output work. F, input power. G, output power H, wasted energy. i, efficiency​

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.