Answer:
C
Explanation:
Static electricity is what makes your hair stand up when you rub a balloon against it or gives you a shock from your doorknob. In static electricity, electrons are moved around mechanically (i.e. by someone rubbing two things together).
HOPE THIS HELPED AND LETTER D MADE ME LAUGH
It is said to be concave
and convex is the one reflecting outward
It's a normal force exerted by the floor. It balances the gravitational force. Option A is correct. The normal force is balanced by the gravitational force.
<h3>What is the friction force?</h3>
It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N). Mathematically it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and accelertaion in the different components and balancing the equation gets components in the y-direction.
The normal force is balanced by the gravitational force. It's a normal force exerted by the floor. It balances the gravitational force.
Hence, option A is correct.
To learn more about the friction force refer to the link;
brainly.com/question/1714663
#SPJ1
Answer:
0.3625
Explanation:
From the given information:
Consider the equilibrium conditions;
On the ladder, net torque= 0
Thus,
; and
However, by rearrangement;
![\mu= \dfrac{ (323 \ N) ( 10.8 \ m) \ cos 56^0 + (734 \ N) (7.46 \ m) \ cos \ 66.46^0}{\Big [(323 \ N)+(734 \ N) \Big] (10.8 \ m)}](https://tex.z-dn.net/?f=%5Cmu%3D%20%5Cdfrac%7B%20%28323%20%20%5C%20N%29%20%28%2010.8%20%5C%20m%29%20%5C%20cos%2056%5E0%20%2B%20%28734%20%5C%20N%29%20%287.46%20%5C%20m%29%20%5C%20cos%20%20%5C%20%2066.46%5E0%7D%7B%5CBig%20%5B%28323%20%5C%20N%29%2B%28734%20%5C%20N%29%20%5CBig%5D%20%2810.8%20%5C%20m%29%7D)
