MasteringPhysics: Course H O session masteringphysics.com/myotitemviewmassignmen

Question

MasteringPhysics: Course H O session masteringphysics.com/myotitemviewmassignmentproblemID 74533 PHY121 at MCC, Spring 2017, Dr. Mott Ch 04 HW Pss 4.1 Projectile Motion Problems PSS 4.1 Projectile Motion Problems Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0 (above the horizontal) travels a horizontal distance of d 17.5 m before hitting the ground. From what height was the rock thrown? Use the value g 9.800 m/s for the free-fall acceleration. Solve

Explanation / Answer

c)

Vox=VoCos30=12cos30=10.4 m/s

Voy=VoSin30=12sin30=6 m/s

Time of flight

t=d/Vox =17.5/10.4=1.684 s

From

Y=Yi+Voyt-(1/2)gt2

Final height when it hits ground is Y=0

0=Yi+6*1.684-(1/2)*9.8*1.6842

Yi=3.8 m

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---