Physics, asked by vineet5034, 7 months ago

how much time willa oobject take to cover 7km with a acceleration of 10m/s^2 and initional velocity of 0 m/s

Answers

Answered by XxHeartHackerRahulxX
0

Answer:

11min 40 sec

Explanation:

s= 7km = 7000 m

a = 10 m/s^2

u = 0 m/s

By using s = u + at

t = (s-u)/a

= 7000/10

= 700 second

= 11 min 40 sec

Answered by Shs07
0

S = 7 km = 7 × 10^3 m

u = 0 m/s

a = 10 m/s^2

We will use third equation of motion i.e

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

That implies ->

7000 = 0 \times t +  \frac{1}{2}  \times 10 \times  {t}^{2}  \\  \\  =  > 7000 = 5 {t}^{2}  \\  \\  =  >  {t}^{2}  = 1400 \\  \\  =  > t =  + 10 \sqrt{10}  \:  \: and \:  \:  - 10 \sqrt{14}  \\  \\since \: t \: cant \: be \: ( - )ve \: so \\  \\   =  > t = 10 \sqrt{14}

10√14 ≈ 37.4 seconds

Hope this helps !

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