Answer:
Explanation:
Given:
mass, 
time, 
velocity, 
coefficient of kinetic friction between wheels & pavement, 
According to first condition,
According to second condition,
<u>Magnitude of frictional force (which acts opposite to the direction of motion):</u>
where N is the normal reaction.
Now, the impulsive force on the wall if the brakes were applied during the crash:
Answer:
A
Explanation:
Friction is a force that makes an object slow down. Not speed up, cause it to move, or occurs in a vacuum. Friction is often caused by the surface an object is moving on.
Answer:
Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. - Mass number: count of the total number of protons and neutrons in an atom's nucleus.
It regulates water content of cells, it gives pigment to some fruit and flowers and it provides turgidity to plant cells
