Don't get this 2d motion problem?

AI Thread Summary
The problem involves calculating the speed at which a second player must run to catch a football kicked at a 40-degree angle with an initial speed of 14.0 m/s, while standing 26.0 m away. The player must reach the ball just before it hits the ground, ignoring air resistance. To solve this, one must determine the time it takes for the ball to reach the ground and then use that time to calculate the required running speed. The key concept is understanding the projectile motion of the ball and the horizontal distance covered. The solution requires applying kinematic equations for both the ball's trajectory and the runner's motion.
elpermic
Messages
29
Reaction score
0
don't get this 2d motion problem??

Homework Statement


a player kicks a football at an angle of 40.0 degrees above the horizontal with an initial speed of 14.0 m/s. Air resistance may be ignored. A second player standing at a distance of 26.0m from the first(in the direction of the kick) starts running to meet the ball at the instant it is kicked. How fast must he run in order to catch the ball just before it hits the ground?


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org


i don't get the concept at how to do this when the question asks me "to catch the object before it hits the ground"
 


Just assume the player catches the ball a tiny tiny amount (effectively 0 meters) above the ground.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

Baseball in the air 2D motion question
Replies
1
Views
2K
How do i account for the height for projectile motion
Replies
7
Views
3K
2D Kinematics - 2 rocks off a bridge
Replies
1
Views
3K
Projectile Motion Experimental Error
Replies
1
Views
2K
Projectile Motion Soccer Ball Problem
Replies
22
Views
5K
Find the equation y(x) from y(t) & x(t) then find theta max
Replies
22
Views
3K
Projectile Motion Graph Analysis
Replies
1
Views
2K
2D kinematic problem: Tennis serve
Replies
14
Views
11K
Solving 2D Motion Problems: Where to Start?
Replies
2
Views
2K
Projectile motion, find speed/time of football kick
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top