Question

A body starting initially from rest gains a speed of 4 m/s in 0.5 s.Its acceleration is ​

Answer 1

Answer:

Initial velocity (u) = 0m/s

Final velocity (v) = 4m/s

Time = 0.5sec

Acceleration = v-u/t

Acceleration = 4-0/0.5

Acceleration = 8m/sec^2

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Answer 2

Question:-

A body starting initially from rest gains a speed of 4 m/s in 0.5 s.Its acceleration is

Solution:-

Given,

• Body starts from rest.[ u = 0 ]
• It gains a velocity of 4m/s.
• Within 0.5sec

We have to use first equation of motion to find the acceleration:-

➭ v = u + at

➭ 4 = 0 + 0.5a

➭ 4 = 0.5a

➭ a = 4/0.5

➭ a = 8m/s²

Or,

We can find the acceleration by using a = (v - u)/t formula:-

➭ a = (v - u)/t

➭ a = (4 - 0)/0.5

➭ a = 4/0.5

$\boxed{ \: a \: = 8m/{s}^{2} }$