session.masteringphysics.com Rocket Rises From With An Chegg.com A Falling Stone
ID: 1883785 • Letter: S
Question
session.masteringphysics.com Rocket Rises From With An Chegg.com A Falling Stone Takes 0.288 To Travel Past A Chegg.com Phys121/52 Fall 2018 deema Item 4 4 of 6> A rocket rises vertically, from rest, with an acceleration of 3.2 m/s until it runs out of fuel at an altitude of 780 m. After this point, its acceleration is that of gravity, downward Part C What maximum altitude does the rocket reach? Express your answer to two significant figures and include the appropriate units. Units Submit Part D How much time (total) does it take to reach maximum altitude? Express your answer to two significant figures and include the appropriate units. alue Units Submit Request Answer Part E With what velocity does it strike the Earth? Express your answer to two significant figures and include the appropriate units.Explanation / Answer
C] using third equation of motion,
v = sqrt(2as) = sqrt(2*3.2*780) = 70.654 m/s
maximum height = 780 + h
= 780 + v^2/2g
= 780 + 70.654^2/[2*9.8]
= 1034.7 m
= 1.0*10^3 m answer (in two sig fig)
D] total time = t1+t2
= v/a + -v/-g
= 70.654/3.2 + 70.654/9.8
= 29 s (in two sig fig)
E] velocity of striking earth = sqrt(2gh)
= sqrt(2*9.8*1034.7) = 142 m/s
= 1.4*10^2 m/s (in two sig fig)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.