A63kg object needs to be lifted 7 meters in a matter of 5secs. approximately how much horsepower is required to achieve this task? ( a.)864.36hp.(b)0.59hp (c)441hp(d)1.16hp

Force needed to lift the object = (mass) (gravity)
                                                   =  (63 kg) (9.8 m/s²) =  617.4 Newtons

Work = (force) x (height)
          = (617.4 N) (7 m)  =  4,321.8 joules

Rate required to get it done in 5 sec = (4,321.8 J) / (5 sec)
                                                             =  864.4 watts

1 HP = 746 watts

               (864.4 watts) x (1 HP / 746 watts)  =  1.159 HP .

Choice (d) looks encouraging.