Motion in 2D Question: Solving for Time and Impact of a Thrown Stone

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SUMMARY

The discussion centers on solving a 2D motion problem involving a stone thrown horizontally from a cliff 26.0 meters high with an initial speed of 15.0 m/s. To determine the time until impact, participants emphasize using kinematic equations that incorporate gravitational acceleration. The angle of impact can be calculated using the law of sines, factoring in the horizontal distance traveled by the stone. This approach provides a clear method for solving projectile motion problems in physics.

PREREQUISITES
  • Kinematic equations for projectile motion
  • Understanding of gravitational acceleration (9.81 m/s²)
  • Basic trigonometry, including the law of sines
  • Concept of horizontal and vertical motion components
NEXT STEPS
  • Study kinematic equations in detail, focusing on horizontal and vertical components
  • Learn how to apply the law of sines in projectile motion scenarios
  • Explore examples of 2D motion problems involving different angles and heights
  • Investigate the effects of air resistance on projectile motion
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding projectile motion and its applications in real-world scenarios.

rjelalam
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Please Help! Motion in 2D Question

Homework Statement



A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 15.0 m/s. The cliff is h = 26.0 m above a flat horizontal beach, as shown in Figure P3.24.


Homework Equations


How long after being released does the stone strike the beach below the cliff?

With what speed and angle of impact does the stone land?
_________m/s
_________° below the horizontal




The Attempt at a Solution

 
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rjelalam said:

The Attempt at a Solution


I tihnk you forgot that part :confused:

start with the kinematic equations.
 


Well, that depends on the height of the student, unless of course, the 26.0 meters include the student's height with the cliff's. Try to find an equation that involves gravity:smile: as that is most definitely important. Also, find the distance from where the rock was released to the where it lands, then use the law of Sines to find your angle. I hope this is helpful, as this is one of my first posts! :smile:
 

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