🎉 Announcing Numerade's $26M Series A, led by IDG Capital!Read how Numerade will revolutionize STEM Learning Oh no! Our educators are currently working hard solving this question. In the meantime, our AI Tutor recommends this similar expert step-by-step video covering the same topics. Numerade Educator ### Problem 112 Easy Difficulty # For the rocket described in Examples 8.15 and 8.16 (Section 8.6$)$, the mass of the rocket as a function of time is $$m(t)=\left\{\begin{array}{ll}{m_{0}} & {\text { for } t<0} \\ {m_{0}\left(1-\frac{t}{120 \mathrm{s}}\right)} & {\text { for } 0 \leq t \leq 90 \mathrm{s}} \\ {m_{\mathrm{d}} / 4} & {\text { for } t \geq 90 \mathrm{s}}\end{array}\right.$$(a) Calculate and graph the velocity of the rocket as a function of time from$t=0$to$t=100 \mathrm{s}$. (b) Calculate and graph the acceleration of the rocket as a function of time from$t=0$to$t=100 \mathrm{s}$(c) A$75-k g$astronaut lies on a reclined chair during the firing of the rocket. What is the maximum net force exerted by the chair on the astronaut during the firing? How does your answer compare with her weight on earth? ### Answer ## a.$3327 \mathrm{m} / \mathrm{s}$b.$a=0$c.$6.0 \times 10^{3} \mathrm{N}\$

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Moment, Impulse, and Collisions

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##### Christina K.

Rutgers, The State University of New Jersey

##### Andy C.

University of Michigan - Ann Arbor

##### Farnaz M.

Simon Fraser University

##### Aspen F.

University of Sheffield

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### Video Transcript

Davidson College

#### Topics

Moment, Impulse, and Collisions

##### Christina K.

Rutgers, The State University of New Jersey

##### Andy C.

University of Michigan - Ann Arbor

##### Farnaz M.

Simon Fraser University

##### Aspen F.

University of Sheffield

Lectures

Join Bootcamp