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3 years ago

id="TexFormula1" title="what \: is \: friction \: \: \: {?} " alt="what \: is \: friction \: \: \: {?} " align="absmiddle" class="latex-formula">

Physics

2 answers:

kkurt [141]3 years ago

7 0

Answer:

Hello There!!

Explanation:

Friction is the resistance to motion which is always exerted in a direction moving relatively to another.

hope this helps,have a great day!!

~Pinky~

sesenic [268]3 years ago

3 0

Answer:

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other

Explanation:

hope it helps

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Velocities of two bodies A and B are given in vectors notation as va =i+2j-3k and Vb=3i+2j-k what will be the relative velocity

ArbitrLikvidat [17]

Answer:

$V_{B/A}=2i+2k$

Explanation:

The relative velocity can be calculated by means of the difference between vector B minus vector A.

$V_{A}=i+2j-3k\\V_{B}=3i+2j-k\\V_{B}-V_{A}=(3-1)i + (2-2)j+(-1-(-3))k\\V_{B/A}=2i+2k$

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3 years ago

The following force diagram represents Newton’s Third Law of Motion:

Julli [10]

Answer:

<u>FALSE.</u>

Explanation:

Newton's third law states that :

<em>Every action has equal and opposite reaction</em>
<em>That is , the magnitude is the same but the directions are opposite</em>
<em>The action reaction forces DONOT operate on the same body.</em>

For example ,

If a block is kept on the ground , the action force is the normal force acting on it due to the ground. <em>BUT , NOTE THAT : the reaction force isn't the gravitational force on the body ! It is the normal force acting on the ground due to the block !</em>

Thus,

we conclude that action and reaction forces donot act on the same body and therefore , this case has the <u>answer : FALSE </u>