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.

1470J

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

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers