Question
(a) What is the initial acceleration of a rocket that has a mass of 1.50 \times 10^6 \textrm{ kg}$at takeoff, the engines of which produce a thrust of$2.00 \times 10^6 \textrm{ N}$? Do not neglect gravity. (b) What is unreasonable about the result? (This result has been unintentionally achieved by several real rockets.) (c) Which premise is unreasonable, or which premises are inconsistent? (You may find it useful to compare this problem to the rocket problem earlier in this section.) Question by OpenStax is licensed under CC BY 4.0. Final Answer a)$-8.47 \textrm{ m/s}^2\$

b) The rocket is accelerating down instead of up.

c) The thrust is not large enough, or the mass is too large.

Solution Video