<span><span><span>FIRST EQUATION OF MOTION
Vf = Vi + at</span> </span><span>Consider a body initial moving with velocity "Vi". After a certain interval of time "t", its velocity becomes "Vf". Now</span>Change in velocity = Vf - Vi <span>
OR
DV =Vf – Vi</span><span>Due to change in velocity, an acceleration "A" is produced in the body. Acceleration is given by</span>a = DV/t Putting the value of "DV"<span><span>a = (Vf – Vi)/t
at = Vf – Vi
at + Vi =Vf
</span>OR
</span><span>Vf = Vi + at
</span>
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Divide 30 by 5 and you will get how many seconds it would take for you to hop 30 meters
B is the only answer that makes sense.
A that would mean the car only moves 5 mi/hr
C just doesn't make sense
D the equation never mentions the velocity changing
Answer:
Coefficient of friction is defined as the ratio of the force of friction acting between two objects and the force which is pushing them together.
F = μN
F → Friction Force
N → Normal Force
μ → Coefficient of Friction
Coefficient of Friction depends on:
i) Nature of the surface
ii) Material of the object