oedhe Motion Problems previou PSS 4.1 Projectile Motion Problems Learning Goal:

Question

oedhe Motion Problems previou PSS 4.1 Projectile Motion Problems Learning Goal: Solve To practice Problem-Solving Strategy 4.1 for 10 proiectile motion problems Part C A rock thrown with speed 11.0 m/s and launch angle 30.0° horizontal distance of d 16.5 m before hitting the ground. From what height was the rock thrown? Use the value g-9.800 m/s2 for the free-fall Find the height h from which the rock was launched. Express your answer in meters to three significant figures I (above the horizontal) travels a Hints Submit My Answers Give Up ob Assess SS 4 Part D Arro This question will be shown after you complete previous question(s) this Cor 18

Explanation / Answer

By using the trajectory equation

y = h + x*tan theta - g*x^2 / (2v^2*cos^2 theta)

where, y = 0 m

h = ?

x = 16.5 m

theta = 30 degree

v = 11 m/s

0 = h + 16.5*tan 30 degree - (16.5)^2*9.8/ (2*11^2* cos^2 30 degree)

h = 14.7 m = yi answer

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