The potential energy of the body is "200 Joule".
According to the question,
Mass,
Height,
or,
= 2 m
As we know,
→ The potential energy will be:
= 
By putting the given values, we get
= 
= 
Thus the above answer is right.
Learn more about potential energy here:
brainly.com/question/23859978
Answer:
Bike
Explanation:
bike is the most complex on here, chain, brakes, gears, and tries,
inclined plank is a little complex, gears and plates
lever requires gears or eletric wires,
and least complex is A screw
Answer: A. Work is done on the system and heat is transferred from the system for a net decrease in internal energy.
Explanation:
A refrigerator is a device which dispenses heat from the close system to a warmer area or in the surrounding. By dispensing the heat the internal temperature of the refrigerator drops. The system of refrigerator violates the second law of thermodynamics. As it performs the work to cool the region instead of heating the region. The work is done on the system and the internal energy decreases and the heat energy is liberated to the surrounding area. A refrigerator is an open system.
The formula for work is
F*d
Therefore work=2.0N*3.0=6N*m
