Question

I'm stuck with this question...pls help me
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Answer 1

for first question

there are four engines .. each producing 250,000 N so total comes 4*250,000 N

is has weight 400,000 kg

thus Calculate it 4*250,000/400,000 gives you the answer

2nd question

after calculating acceleration from first part

apply it to the third equation of kinematics

v^2 = u^2 + 2asS.

where s is the distance required