Solve These 2 Physics Problems: Acceleration & Angle of Projection

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Homework Help Overview

The discussion revolves around two physics problems related to projectile motion: determining the acceleration of gravity on a strange planet based on a jump distance and finding the angle of projection for a projectile with a specific range-height relationship.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the relationship between horizontal distance, initial speed, and gravity in the first problem. There is a suggestion to substitute variables in the second problem to find the angle of projection. Questions arise about the effects of gravity on horizontal versus vertical motion.

Discussion Status

The discussion is active, with participants questioning the adequacy of the given information and exploring different aspects of the problems. Some guidance is offered regarding the relationships between variables, but no consensus has been reached on the solutions.

Contextual Notes

One participant notes that they are practicing rather than completing homework, which may influence the nature of the discussion. There is an ongoing examination of the assumptions related to the problems, particularly concerning the role of gravity in horizontal motion.

Moneer81
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1. An astronaut on a strange planet finds that she can jump a maximum horizental distance of 30 m if her initial speed is 9m/s. What is the acceleration of gravity on the planet?

2. A projectile is fired in such a way that its horizental range is equal to three times its maximum height. What is the angle of projection?

thanks
 
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3. What has Moneer81 done so far?
 
by the way this is not a HW I am not in school i am just practicing...

well for the first problem I am wondering if it could be done with the little information we have...

the second one is simpler if we substitute x = 3y into the equations of motion and try to get the x and y component of Vo (initial velocity) then the inverse tangent would give us the angle...

anyone has more detailed comments?
 
1. How is the maximal horizontal distance related to initial speed and acceleration due to gravity?
 
well acceleration due to gravity will have an effect on the vertical distance...not the horizental?
 
Moneer81 said:
well acceleration due to gravity will have an effect on the vertical distance...not the horizental?
But when&where the ball hits the ground again depends on the acceleration due to gravity, does it not?
 
Do you know the formulas for horizontal and vertical motion with a constant (vertical) acceleration?
 
yeah yeah you're right...got it :)
i think i was just thinking harder that I had to
 

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