Question

1.the acceleration of a body is equal to
a. (u-v)/t
b.(v-u)/t
c.(v-u)×t
d.(u-v)×t

2.the equation of uniformly accelerated motion relating the initial velocity final velocity time and acceleration
a S=it+1/2at^2
b. v^2-u^2=2aS
c. v=u +at
d.none of these
3. final velocity,v according to the third equation of motion is
a.
$\sqrt{u + 2as}$
b.u+2aS
c.u^2+2aS
d.ut + 2aS
​

Answer 1

1.We know that the 1st equation of motion is v=u+at.

From this,we get----

=>a=v-u/t

Hence,correct option is b.

2.We know that----

•Initial velocity=u

•Final velocity=v

•Time=t

•Acceleration=a

Thus,v=u+at

Hence,correct option is c.

3.We know that 3rd equation of motion is -----

=>v²-u²=2as

=>v²=u²+2as

=>v=_/u²+2as