Answer:
Explanation:
Let fuel is released at the rate of dm / dt where m is mass of the fuel
thrust created on rocket
= d ( mv ) / dt
= v dm / dt
this is equal to force created on the rocket
= 220 dv / dt
so applying newton's law
v dm / dt = 220 dv / dt
v dm = 220 dv
dv / v = dm / 220
integrating on both sides
∫ dv / v = ∫ dm / 220
lnv = ( m₂ - m₁ ) / 220
ln4000 - ln 2500 = ( m₂ - m₁ ) / 220
( m₂ - m₁ ) = 220 x ( ln4000 - ln 2500 )
( m₂ - m₁ ) = 220 x ( 8.29 - 7.82 )
= 103.4 kg .
Hello! There are four types of non-contact forces I think.
-Gravitational force.
-Magnetic force.
-Electrostatics.
-Nuclear force.
Hope this helps! :)
Answer:
statement 1
Explanation:
When mass increases,KE increases and when mass decreases, KE also decreases
Kinetic energy = (mv^2)/2. So (.5)(10^2)/2 = 25 J