Question

Reni yg memiliki berat badan 600 menaiki tebing dgm ketinggian 150 m dari permukaan tanah. Besar usaha reni saat mendaki dari ketinggian 50 meter hingga 150 meter sebesar

Answer 1

Given : weighs 600n climbing a cliff 150 m above the ground.

To find : The amount of effort reni when climbing from a height of 50 meters to 150 meters

Solution:

600 N  = mg

Potential Energy  = mgh

Potential Energy at  50 m  =  mg (50)

= 600 (50)

= 30000 Joule

= 30 k Joule

Potential Energy at  150 m  =  mg (150)

= 600 (150)

= 90000 Joule

= 90 k Joule

amount of effort /energy required  = 90 k - 30 k = 60 k Joule

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