The answer is A. Hope this helps I tried my best!
Answer:
A) do a greater amount of work than the amount of work done on the machine
Explanation:
By the principle of conservation of energy, energy can never be created or destroyed.
To do more work by a machine than the amount of work done on the machine is impossible because to do so machine will have to create energy within itself which violates the principle of conservation of energy.
Extra bit,
These kind of machine are defined as perpetual-motion machines and there are many attempts in history to create one such device but all were failed.
Answer:
Explanation:
The energy lost due to air friction is equal to the mechanical energy lost by the parachutist during the fall.
The initial mechanical energy of the parachutist (at the top) is equal to his gravitational potential energy:
where
m = 20.1 kg is his mass
is the acceleration due to gravity
h = 662 m is the initial heigth
The final mechanical energy (at the bottom) is equal to his kinetic energy:
where
v = 7.12 m/s is the final speed of the parachutist
Therefore, the energy lost due to air friction is:
Answer:
A
Explanation:
More potential energy equals more kinetic
I think it’s cannot be determined
