Answer:
The potential energy of an object is the energy possessed by the object due to its position in a gravitational field.
Mathematically, it is given by:
where
m is the mass of the object
g is the acceleration due to gravity at the location of the object
h is the height of the object
As we can see, the potential energy depends on the height of the object, h.
However, this height is relative, since it can be measured using different reference levels.
Generally, the reference level is taken to be the ground; so for example, an object located at the top of a cliff 40 m above the ground, has
h = 40 m
But this value is of course relative, since we can also take the reference level to be the top of the cliff, so in that case, we would have
h = 0
Answer:
1.5min
Explanation:
To solve the problem it is necessary to take into account the concepts related to Period and Centripetal Acceleration.
By definition centripetal acceleration is given by
Where,
V = Tangencial velocity
r = radius
With our values we know that
Therefore solving to find V, we have:
For definition we know that the Time to complete are revolution is given by
Answer:
The electron tends to go to the region of 4. higher electric potential.
Explanation:
When a charged particle is immersed in an electric field, it experiences a force given by
where
q is the charge of the particle
E is the electric field
The direction of the force depends on the sign of the charge. In particular:
- The force and the electric field have the same direction if the charge is positive
- The force and the electric field have opposite directions if the charge is negative
Therefore, an electron (negative charge) moves in the direction opposite to the electric field lines.
However, electric field lines go from points at higher potential to points at lower potential: so, electrons move from regions at lower potential to regions of higher potential.
Therefore, the correct answer is
The electron tends to go to the region of 4. higher electric potential.