Question

solve it full solution​

Answer 1

Answer:

10/3km

Explanation:

here in the first step i have calculated the acceleration and apllied lwas of motion s =ut+1/2at^3

Answer 2

☯ GiveN :

• Initial velocity (u) = 20 km/h
• Final velocity = (v) = 80 km/h
• Time taken (t) = 4 mins = 4/60 = 1/15 seconds.

$\rule{200}{1}$

☯ To FinD :

We have fo find the distance travelled by the bus.

$\rule{200}{1}$

☯ SolutioN :

We know the formula to calculate acceleration

$\Large{\implies{\boxed{\boxed{\sf{a = \frac{v - u}{t}}}}}}$

★ Putting Values ★

$\sf{\dashrightarrow a = \frac{ \frac{80 - 20}{1} }{15}} \\ \\ \sf{\dashrightarrow a = \frac{60 \times 15}{1}} \\ \\ \sf{\dashrightarrow a = 900 } \\ \\ \Large{\implies{\boxed{\boxed{\sf{a = 900 \: Kmh^{-2}}}}}}$

$\rule{150}{2}$

Now,

$\Large{\implies{\boxed{\boxed{\sf{s = ut + \frac{1}{2} \: at^2}}}}}$

★ Putting Values ★

$\sf{\dashrightarrow s = 20(\frac{1}{15}) + \frac{1}{2} \: 900 \times (\frac{1}{15})^2} \\ \\ \sf{\dashrightarrow s = \frac{4}{3} + 450 \times \frac{1}{225}} \\ \\ \sf{\dashrightarrow s = \frac{4}{3} + 2} \\ \\ \sf{\dashrightarrow s = \frac{4 + 6}{3}} \\ \\ \sf{\dashrightarrow s = \frac{10}{3}} \\ \\ \Large{\implies{\boxed{\boxed{\sf{s = \frac{10}{3} \: km}}}}}$