Question

A rocket fired from the earth's surface eject
1% of its mass at a
speed of 200m/s in the 1st second. Find the average acceleration of the rocket in the first second. ​

Answer 1

Thrust Force=v×(dm)/(dt)

V=(200m/s)(given)

Let the Mass of Rocket be"m"

(dm)/(dt)=(1% of m)/1

Simplify it,

=(m)/(100)

then, we get F=(2000)×(m)/(100)

Simplify it,

F=(20m)Newtons

as we know that, F=ma

(20m)=m×a

Simplify it,

a=(20)ms^-2