Question

If you speed up from rest to 12 m/s in 3 seconds, what is your acceleration?

Answer 1

Required Answer:-

Question:

• If you speed up from rest to 12m/s in 3 seconds, what is the acceleration?

Answer:

• The acceleration produced is 4m/s²

Solution:

If a body is at rest, then,

→ u = 0m/s  (i.e., initial velocity is 0m/s)

It's given that,

→ v = 12m/s  (final velocity)

→ t = 3s.  (time taken)

We know that —

     "Acceleration is the rate of change of velocity with time".

So,

→ a = (v - u)/t

Substituting the values, we get,

→ a = (12 - 0)/3 m/s²

→ a = 12/3 m/s²

→ a = 4m/s²

→ Hence, the acceleration produced is - 4m/s²

Answer 2

Answer:

Given,

★ initial velocity u = 0 m/s ; cause, the body is at rest.

★ final velocity v = 12 m/s

★ time t = 3 s

★ acceleration a = to find

Formula :

$\large \pink {\boxed { \sf\: acceleration \: \: a = \frac{v - u}{t} }}$

Solution :

$\large \sf \: \: \: a = \frac{12 - 0}{3} \\ \sf \: \: \: \: \: \: \: = 4 \: m {s}^{ - 2}$

$\large \green {\boxed {\sf acceleration \: \: a = 4 \: m {s}^{ - 2} }}$