<h2>Hello!</h2>
The answer is: B) NOT all potential energy is converted to kinetic energy
<h2>Why?</h2>
Let's discard each option in order to find the correct option:
A) energy is NOT always conserved, False: Energy is always conserved, energy can turn to another kind of energy but the energy will be always conserved.
B) NOT all potential energy is converted to kinetic energy, True: We must remember that Energy of Friction usually opposes to the movement of a body, so, it means that all the potential energy (work) applied to an object would not be converted into kinetic energy (movement).
C) all of an object's kinetic energy turns into potential energy, false: Since the Energy of Friction is acting, not all of the kinetic energy will be turned into potential energy.
D) all of an object's potential energy turns into kinetic energy, false: Since B is true, D is false, not all potential energy is converted to kinetic energy because of the energy of friction.
Have a nice day!
Explanation:
In physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement. A force is said to do positive work if (when applied) it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force.
Quick Facts: Common symbols, SI unit ...
Work
A baseball pitcher does positive work on the ball by applying a force to it over the distance it moves while in his grip.
Common symbols
W
SI unit
joule (J)
Other units
Foot-pound, Erg
In SI base units
1 kg⋅m2⋅s−2
Derivations from
other quantities
W = F ⋅ s
W = τ θ
Dimension
M L2 T−2
Close
For example, when a ball is held above the ground and then dropped, the work done by the gravitational force on the ball as it falls is equal to the weight of the ball (a force) multiplied by the distance to the ground (a displacement). When the force F is constant and the angle between the force and the displacement s is θ, then the work done is given by:
{\displaystyle W=Fs\cos {\theta }}{\displaystyle W=Fs\cos {\theta }}
Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy.
Some scientist believe that the ozone layers of the earth had been weakening and the waters or current changes direct ever 5-7 month.
As the greater force of tension (by 81N) is exerted by the team on the right the rope will move to the right.
The answer would be a positive charge
