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Chrome File Edit View History Bookmarks People Window Help 56%D Wed 2:35 PM Mastering Physics: Week 2 Max Pearson My Lab and Mastering X https: asteringphysics com 74901125 session, https session mastering physi College Physics I TAMU Week 2 Problem 2.84 cements previous l 9 of 13 l next ctor hasn't posted any announcemer Problem 2.84 Part A SPCH 1315 If the camera is 40 m above the ground when it is dropped, how much time does it take for the Ahot-air balloon is descending at a rate of 2.5 m/s camera to reach the ground? when a passenger drops a camera. Express your answer using two significant figures. Calendar Monday 29 Subm My Answers Give PHYS 140 incorrect Try Again Equations 13 Part B If the camera is 40 m above the ground when it is dropped, what is its velocity just before it lands? Screen Shot 20 Let upward be the positive direction for this problem. 017-02. 5.05 PM Express your answer using two significant figures. 27 Screen Shot 017-02. 5.25 PM m/8 My Answers Give Up show All X uations-od

Explanation / Answer

here,

velocity, v = 2.6 m/s

part a:
height , h = 40

from second eqn of motion :

h(t) = h + ut + 0.5*at^2
h(t) = 40 - 2.6*t - 0.5*9.81*t^2

When the camera hits the ground at time T, we know that h(T) = 0 m, so

0 = 40 - 2.6 *t - 0.5 * 9.81 * t^2

time, t = 2.603 s

part b:

In a constant acceleration problem, the velocity is given by the equation

v(t) = -2.6 - 9.81 * 2.603

v(t) = - 28.135 m/s

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