Answer:
m/s^2
Explanation:
Force = mass × acceleration
kgm/s^2 = kg × acceleration
where acceleration = Force ÷ mass
= kg m/s^2 ÷ kg
:Acceleration = m/s^2
== You're pushing the load <u><em>straight</em></u> along the horizontal surface at a <u><em>constant speed</em></u>.
== The speed and direction of the load are not changing, so there is <u><em>no acceleration.</em></u>
== From Newton's 2nd law of motion, we know that F = m A . Since A=0, F must also be zero. That means <em>NO NET FORCE</em> is acting on the load.
== But how can that be ? You're pushing it with 90 N !
== The NET force is zero. So something else must be pushing the box, also with <em>90 N of force, exactly opposite to YOUR force, </em>and they add up to zero.
== THERE's your force of friction !
Magnitude of change is 15km/h
change in direction is to the right?
D. Frictional
The other three are energies while frictional energy is not
Explanation:
a potassium ion has a charge of 1+.
Magnesium is in the second column and therefore has 2 electrons in its outermost shell. It would tend to lose two electrons and form a +2 ion. Potassium is in the first column and therefore has 1 electron in its outermost shell. It would tend to lose one electron and form a +1 ion.
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