Question

car moving with uniform acceleration of 10m/s^2 on straight road changes its speed from 10m/s to 30m/s find time lapsed for change of speed
​
​

Answer 1

Answer:2 sec

Explanation:

Answer 2

Answer:

$\bigstar{\bold{Time\:=\:2\:s}}$

Explanation:

$\Large{\underline{\underline{\bf{Given:}}}}$

• Initial velocity (u) = 10 m/s
• Final velocity (v) = 30 m/s
• Acceleration (a) = 10 m/s²

$\Large{\underline{\underline{\bf{To\:Find:}}}}$

• Time taken (t)

$\Large{\underline{\underline{\bf{Solution:}}}}$

➢ By the first equation of motion,

    v = u + at

➢ Substituting the given datas, we get

    30 = 10 + 10 × t

    t = 20/10

$\boxed{\bold{Time\:=\:2\:s}}$

$\Large{\underline{\underline{\bf{Solution:}}}}$

➜ The three equations of motion are

• v = u + at
• s = ut + 1/2 × a × t²
• v² - u² = 2as