Physics, asked by technicalboyak, 1 year ago

Solve this
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Answered by Anonymous

Total acceleration= given acceleration + acceleration due to gravity

=5+9.8

=14.8m/s²

According to Newton's second law of motion,

force= mass*acceleration

=20000*14.8

=296000N

=2.96*10^5, i.e, option (c)

technicalboyak: But gravity is acting downward so why have you added the both

Anonymous: We can understand this better by looking at this formula... acceleration(a) = acceleration due to gravity(g) + thrust(t)...

Anonymous: now we have to find the thrust... so,transferring the values... t=a-g => t= 5-(-9.8)=5+9.8....

Anonymous: hope this helps :)

technicalboyak: Hmm thanks bro

Anonymous: :)

Answered by niral

mass of rocket= m=20000 kg

Initial accleration= a=5 m/s^2

Acceleration due to gravity= g=10 m/s^2

using Newton second law of motion , the net force (thurst) acting on rocket is given by relation

F-mg=ma

F=m(g+a)

20000*(10+5)

20000*15

3*10^5 N

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