Question

8. If a body starts from rest and reaches a speed of 18 Km / h in one second, its acceleration is:​

Answer 1

hey mate here is your answer

given

velocity =18km/h=18×(5/18)m/s=5m/s

time=1s

therefore acceleration =velocity/time

=(5/1)m/s =5m/s²

hope it may help you

PLZ MARK ME THE BRAINLIEST!!!

Answer 2

ANSWER:

• The acceleration of the body = 5 m/s²

GIVEN:

• The body starts from rest.

• It reaches the speed of 18 Kmph in 1 s.

TO FIND:

• The acceleration of the body.

EXPLANATION:

1 kmph = 1000 / 3600 m/s

1 kmph = 5/18 m/s

18 kmph = 18 × 5/18 m/s

18 kmph = 5 m/s

$\blue{\bigstar{\boxed{ \gray{ \bold{ \huge{v = u + at}}}}}}$

u = 0 [ As the body starts from rest ]

v = 5 m/s

t = 1 s

5 = 0 + (a)1

a = 5 m/s²

HENCE ACCELERATION OF THE BODY WILL BE 5 m/s².

Some More Formulae:

$\red{\bigstar{\boxed{ \gray{ \bold{ \huge{v^2 - u^2=2as}}}}}}$

$\purple{\bigstar{\boxed{ \gray{ \bold{ \huge{s= ut + \dfrac{1}{2}at^2}}}}}}$