Question

Bart runs up a 2.5 meter high flight of stairs at a

constant speed in 4.25 seconds chasing his
adolescent gazelle. If Bart's mass is 60 kg,
determine the work he did.

Answer 1

1470J

Step-by-step explanation:

Given parameters:

Height of stairs = 2.5m

Time taken = 4.25s

Mass of Bart = 60kg

Unknown:

Work done by Bart = ?

Solution:

Work done is a function of the force acting to move a body through a distance.

Work done = Weight x height

Work done = mass x acceleration due to gravity x height

Work done = 60 x 9.8 x 2.5 = 1470J