A roller coaster with a mass of 500.0 kg starts from a height of 27.0 meters with a speed of 5.6 m/s. It descends to a height of 2.00 meters before it starts back up. Some energy is loss to the work due to friction. The speed at the bottom of the ramp is 22.0 m/s. How much energy was lost to friction?

The energy loss due to friction is 9465 J.

Explanation:

The given data :-

Mass of roller (m) = 500 kg.

The speed of roller coaster at height 27 m = 5.6 m/s.

Initial height of roller( h ) = 27 m.

The speed of roller coaster at bottom = 22 m/s.

Initial energy of roller at a height 27 m.

E₁ = K.E + P.E

E₁ =    =  =  7840 + 132435

E₁ = 140,275 J

The energy of roller at a height 2 m.

E₂ = K.E + P.E

E₂ = =  = 121000 + 9810

E₂ = 130,810 J

The energy loss due to friction = E₁ - E₂  =  140,275 - 130,810  = 9465 J.

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.  

b. a lightning bug, plug of grass, and a worm