Question

Q4) An object can accelerates from
rest at the rate of 2 m/s
i) What will be the velocity attained by
it in 10
seconds?
ii) How far will it travel in this
duration?​

Answer 1

Answer:

(I) u=0

a=2m/s

and t=10s

so v=u+at

v=o+2×10

v=20

now (ii)

s=ut +1/2at^2

1/2×2×10×10

100

Answer 2

Answer:

given

intial velocity= 0

acceleration= 2m/sec²

time = 10 second

To Find

velocity attained in 10 seconds

distance tràvelled in 10 seconds

Solution

★According to first equation of motion

$\fbox{v = u + at}$

where ,

v= final velocity

u = inital Velocity

a= Acceleration

t= time

put the value in the above equation-

❐v= 0 + 2 x 10

❐v= 20 m /sec

★According to second equation of motion-

$\bold {s = ut + \frac{1}{2} a {t}^{2} }$

where,

s= distance

u= inital Velocity

a= Acceleration

t= time

put the value in the above equation-

❐s= 0+ 1/2 x 2 x 10²

❐s= 100m