A load of 600N is lifted using a first class lever applying an effort of 350N .If the distance between the load and the effort is 60 cm and the distance between the load and the fulcrum is 30cm, calculate its efficiency ​

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.