Question

A motor boat starting from rest on a lake accelerate in a straight line at a constant rate of 3 m/ s'2 for 8sec how far does the boat travel during this time

Answer 1

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

As mentioned above, u ( initial velocity ) = 0

a ( acceleration ) = 3 m/s²

t ( time taken ) = 8 s

By using 2nd equation of motion,

s = ut + 1/2 ( at² )

s = (0)(8) + 1/2 (3)(8)(8)

s = 3*4*8

s = 96 m

Hope it helps

Answer 2

Given :

Acceleration of boat = 3 m/s²

Time = 8 seconds

To Find :

The distance travelled by the boat during that time

Solution :

From second equation of motion ,

$\\ \star \: {\boxed{\sf{\purple{s = ut + \dfrac{1}{2}a {t}^{2} }}}}$

Where ,

u is initial velocity

t is time

a is acceleration

s is distance travelled

We have ,

u = 0 [starting from rest]

t = 8 sec

a = 8 m/s²

Substituting the values in the equation ,

$\\ : \implies \sf \: s = (0)(8) + \dfrac{1}{2} (3 ) {(8)}^{2}$

$\\ : \implies \sf \: s = \dfrac{1}{2} (3)(64)$

$\\ : \implies \sf \: s = 32 \times 3 \: m$

$\\ : \implies{\underline{\boxed{\pink{\mathfrak{s = 96 \: m}}}}} \: \bigstar$

Hence ,

The distance travelled by the boat during that time is 96 m.