Question

Find acceleration. Given :-- initial velocity (u) = 7 m/s ;acceleration (m/s2) = ? ; time (seconds) = 4 ; displacement (s) = 92

Answer 1

Answer:

$\fbox{♠given}$

inital Velocity= 7 m/second

displacement= 92 m

time = 4 sec

$\fbox{♠to \: find}$

acceleration

$\fbox{♠ solution}$

According to the second law of motion:

$s = ut + \frac{1}{2} a {t}^{2}$

put the value in the formula and we will get the value of acceleration:

92= 7 x 4 + 1/2 x a x 4²

92 = 28 + 8a

8a = 92-28

8a= 64

$a = \frac{64}{8} = 8 \frac{m}{sec}$

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