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1 answer:
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1) Forces acting on your body: force of gravity and normal reaction
2) Due to Newton's second law, N = mg
Explanation:
1)
When you sit on the computer, there are only two forces acting on you:
- The force of gravity, acting downward, of magnitude
, where m is your mass and
is the acceleration due to gravity, downward
- The normal reaction exerted by the chair on you,
, acting upward
Your body is in equilibrium (it doesn't move), this means that the two forces balance each other, therefore:
2)
We can now apply Newton's second law of motion to this situation; this law states that the net force acting on a body is equal to the product between its mass and its acceleration. Mathematically,
where
is the net force
m is the mass
a is the acceleration
In this situation, the net force is
So the equation becomes
However, we observe that your body is at rest; therefore, the acceleration is zero:
a = 0
And therefore,
Learn more about forces:
#LearnwithBrainly
The concept map is given in the attachment:
The electrostatic force between two charged objects is given by
where
k is the Coulomb's constant
q1 is the charge of the first object
q2 is the charge of the second object
r is the separation between the two objects
In our problem:
So if we plug these numbers into the equation, we can find the electrostatic force between the two objects:
where
k is the Coulomb's constant
q1 is the charge of the first object
q2 is the charge of the second object
r is the separation between the two objects
In our problem:
So if we plug these numbers into the equation, we can find the electrostatic force between the two objects: