Question

find the distance of body with V is 120m/s^-1 A is 20m/s^-2
calcukate velocity and distance travelled in40 sec
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Answer 1

Answer:

$a = \frac{v - u}{t}$

$20 = \frac{120 - u}{40}$

$800 = 120 - u$

$u = - 680m \: per \: sec$

$v {}^{2} - u {}^{2} = 2as$

$(120 {)}^{2} - ( - 680) {}^{2} = 2 \times 20 \times s$

$- 448000 = 2 \times 20 \times s$

$s = \frac{ - 448000}{40}$

$s = - 11200m$

$|s| = | - 11200|$

$s = 11200m$