Physics Homework involving projectile motion.

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SUMMARY

The discussion focuses on solving a projectile motion problem involving a golf ball hit at a velocity of 50 m/s at an angle of 17 degrees. The key equation provided is y = vi(sinθt) - 4.9t², which leads to the quadratic equation 0 = -4.9t² - 48.1t. The user encountered difficulties with algebraic manipulation and the quadratic formula, emphasizing the importance of ensuring the calculator is set to degrees. The solution requires correctly applying the quadratic formula to find the time of flight.

PREREQUISITES
  • Understanding of projectile motion principles
  • Familiarity with the quadratic formula
  • Basic algebra skills
  • Calculator usage for trigonometric functions
NEXT STEPS
  • Review the derivation of projectile motion equations
  • Practice solving quadratic equations using the quadratic formula
  • Learn how to set calculator modes for trigonometric calculations
  • Explore the effects of launch angle on projectile range and time
USEFUL FOR

Students studying physics, particularly those focusing on kinematics and projectile motion, as well as educators looking for examples of algebraic applications in physics problems.

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Homework Statement



A golf ball is hit with a velocity of 50 m/s. The angle to the ground is 17 degrees. find t

Homework Equations


The equation my teacher provided was: y=vi(sinθt)-4.9t^2


The Attempt at a Solution



0= 50sin17-4.9t^2
0=-4.9t^2-48.1t

this is where i got stuck... i guess it's more the actual algebra that I'm stuck on. I tried the quadratic formula but i got an odd answer and now I'm blanking on other options. it's only my 3rd week of school so I'm still sort of rusty.

any help would be greatly appreciated!
 
Physics news on Phys.org
Check that your calculator is set for angles in degrees rather than radians.
 
gneill said:
Check that your calculator is set for angles in degrees rather than radians.

Thank you! New calculator...
 

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