Question

a car starting from rest is moving with an acceleration of 2 m/s2 covers a distance of 100m a) calculated the time required to cover 100m b) find the final velocity of the car

Answer 1

Answer:

Hi!

Your Answer is:

t = 10s

v = 20m/s

Explanation:

Given-

a = 2 m/s^2

s = 100 m

u = 0

∴, by the third equation of motion,

$2as = v^{2} -u^{2} \\2*2*100=v^{2}- 0^{2} \\400=v^{2}\\\sqrt{400}=v\\20=v$

∴, v = 20 m/s

Now, by the first equation of motion,

$v=u+at\\20=0+2t\\\frac{20}{2} =t\\10=t$

∴, t = 10 s