Question

A scooter requires a speed of 36km/h in 5 seconds just after start. What is the acceleration

Answer 1

Answer:

2 m/s^2

Explanation:

According to the given question,

u = initial velocity = 0 m/s

v = final velocity = 36 km/h = 36×1000/3600 = 10 m/s

t = time = 5 sec

a = acceleration

And we are asked to find the acceleration of the scooter.

We know,

• v = u+at

Putting the values we get,

• 10 = 0+5a

• 5a = 10

• a = 10/5

• a = 2 m/s^2

Thus the acceleration of the scooter is 2 m/s^2 when time is 5 sec and velocity is 36 km/h.

Answer 2

Answer:

$\large{\underline{\boxed{\sf a = 2\:m/s^2}}}$

Explanation:

Given that ;

Initial velocity (u) = 0 m/s

Final velocity (v) = 36 km/h

Converting km/h into m/s,

⇒ v = 36 * 5/18

⇒ v = 10 m/s

Time (t) = 5 secs

_______________________

To find acceleration(a), we will use first equation of motion ;

v = u + at

⇒ 10 = 0 + a * 5

⇒ 10 = 5a

⇒ a = $\sf \dfrac{10}{5}$

⇒ a = 2 m/s²

Hence, the acceleration of the scooter is 2 m/s².