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

AI Thread Summary
A student throws a stone horizontally from a 26.0 m high cliff at a speed of 15.0 m/s and seeks to determine the time it takes for the stone to hit the beach below. To solve this, kinematic equations involving gravity should be applied, taking into account the height of the cliff. The time of flight can be calculated using the vertical motion equations, while the horizontal distance traveled helps in determining the impact speed and angle. The law of sines may be useful for finding the angle of impact. This problem combines concepts of projectile motion and requires careful consideration of the initial conditions.
rjelalam
Messages
1
Reaction score
0
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

 
Physics news on Phys.org


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:
 

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

Solving a Ball Thrown off a Cliff: How Long Does it Take?
Replies
4
Views
2K
Finding the angle of the velocity vector of a projectile at moment of impact
Replies
3
Views
4K
Angle that the stone is thrown off of the cliff?
Replies
32
Views
4K
How Do You Calculate the Meeting Point of Two Stones Thrown from a Cliff?
Replies
1
Views
2K
Rock is being thrown horizontally off a cliff (2d motion)
Replies
9
Views
3K
Motion in Two Dimensions-Projectile off cliff
Replies
2
Views
8K
How to Calculate Projectile Motion for a Thrown Stone
Replies
2
Views
1K
What is the velocity and angle of impact when throwing a rock off a cliff?
Replies
5
Views
10K
Kinematics: falling stone question
Replies
13
Views
11K
Stone thrown off a cliff: height and angle
Replies
5
Views
5K

Hot Threads

Recent Insights

Back
Top