A(n) 15.9 kg rock is on the edge of a(n
1 answer:
The potential energy (P.E) of the rock relative to the base of the cliff is 31,054.926 Joules..
<u>Given the following data:</u>
- Mass of rock = 7.5 kg
- Height = 0.7 m
- Acceleration due to gravity = 9.8
To calculate the potential energy (P.E) of the rock relative to the base of the cliff:
<h3>What is potential energy?</h3>
Potential energy (P.E) can be defined as the energy that is possessed by an object due to its position (height) above planet Earth.
Mathematically, potential energy (P.E) is given by this formula;
<u>Where:</u>
- P.E is the potential energy.
- m is the mass of an object.
- g is the acceleration due to gravity.
- h is the height of an object.
Substituting the given parameters into the formula, we have;
P.E = 31,054.926 Joules.
Read more on potential energy here: brainly.com/question/8664733
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Explanation:
See attached file
Explanation:
(a) The force exerted by the electric field on the plastic sphere is equal to
where
is the charge of the sphere and E is the strength of the electric field. This force should balance the weight of the sphere:
where m is the mass of the sphere and g is the gravitational acceleration.
Since the two forces must be equal, we have:
and so we find the intensity of the electric field
(b) Now let's find the direction of the field. The electric force must balance the weight of the sphere, which is directed downward, so the electric force should be directed upward. Since the charge is negative, the force is opposite to the electric field direction, and so the direction of the electric field is downward.
where
where m is the mass of the sphere and g is the gravitational acceleration.
Since the two forces must be equal, we have:
and so we find the intensity of the electric field
(b) Now let's find the direction of the field. The electric force must balance the weight of the sphere, which is directed downward, so the electric force should be directed upward. Since the charge is negative, the force is opposite to the electric field direction, and so the direction of the electric field is downward.