Lars, of mass 66.1 kg, can do work for about 2.00 min at the rate of 1.00 hp (746 W). How long will it take him to climb three flights of stairs, a vertical height of 15.0 m? Express your answer in seconds.

The answer to the question is;

To climb three flights of stairs, a vertical height of 15.0 m will take Lars 13.04 s.

Explanation:

To solve the question, we note that

Mass m of Lars = 66.1 kg

Rate of doing work, power of Lars = 746 W = 746 J/s = Energy/time

Height of the stairs = 15.0 M

Energy required  = Potential energy gained at top of stairs = m×g×h

m×g×h = 66.1 kg×9.81 m/s²×15 m = 9726.615 J

Therefore the time required = Energy/Power = 9726.615/746 = 13.04 s

It take Lars 13.04 s to climb three flights of stairs, a vertical height of 15.0 m

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.