Question

A man climbs a ladder carrying a concrete block of mass 5 kg. If the ladder makes an angle of 30° to the vertical and is 3 m long, how much work the man does on the block ?
(ans is 129.9, please I know the final ans I need the expiation)NO SPAM ANSS

Answer 1

Answer:

vertical height can be calculated using sin30=1/2=height/ hypotenuse

height=(1/2)×hypotenuse=3/2

work =mgh=5×9.8×(3/2)=4.9×15=73.5