ASSIGNMENT RESOURCES HW2 Chapter 2_Spring Chapter 02, Problem 068 2018 002 003 e
ID: 1872810 • Letter: A
Question
ASSIGNMENT RESOURCES HW2 Chapter 2_Spring Chapter 02, Problem 068 2018 002 003 er 02. ProblemFlying Circus of Physics A salamander of the genus Hydromantes captures prey by launching its mtongue as a projectile: The skeletal part of the tongue is shot forward, 004 Chapter 02, Problem unfolding the rest of the tongue, until the outer portion lands on the prey, chaoter 92. Problemf Chapter 02, Problem indicated accelerations are a2 = 420m/s2 and a1 = 145m/s2. What is the 2robilem outward speed of the tongue at the end of the acceleration phase? sticking to it. The figure shows the acceleration magnitude a versus time t for the acceleration phase of the launch in a typical situation. The 015 017 028 45 051 0 10 20 30 40 Review Score Review Results by Study Objective t (ms) Mobile site Number Units the tolerance is +/-590Explanation / Answer
The velocity is the area under the acceleration-time curve, so assuming your figure looks like this one,
v = ½*145m/s²*10ms + ½*(145+420)m/s²*10ms = 3.55 m/s
is the acceleration through 30 ms.
if the velocity at the end of the acceleration AND deceleration phase is wanted, then that's
V = 3.55m/s + ½*420m/s²*10ms = 5.65 m/s