Solve Homework Questions: Moon Walk, Slingshot, Ball on String

  • Thread starter Thread starter Kaze105
  • Start date Start date
  • Tags Tags
    Couple
Click For Summary

Homework Help Overview

The discussion revolves around three physics problems involving kinematics and forces. The first problem concerns the motion of a camera dropped from a height on the Moon, the second involves a stone launched from a slingshot, and the third pertains to a ball on a string being held at an angle. Participants are exploring the implications of gravity and motion in these contexts.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the equations of motion relevant to the problems, with some attempting to apply them but expressing confusion about their calculations. Questions arise regarding the acceleration due to gravity on the Moon and how to derive it from the given information.

Discussion Status

The conversation is ongoing, with participants seeking clarification on how to calculate gravitational acceleration and its application to the problems. There is a recognition of the need to derive certain values from the information provided, but no consensus has been reached on the methods or solutions.

Contextual Notes

Participants note the absence of specific values for the Moon's gravity and express uncertainty about how to proceed with the calculations based on the information given in the problems.

Kaze105
Messages
8
Reaction score
0

Homework Statement



Question 1:During a walk on the Moon, an astronaut accidentally drops his camera over a 13.8 m cliff. It leaves his hands with zero speed, and after 2.2 s it has attained a velocity of 3.3 m/s downward. How far has the camera fallen after 3.9 s?

Question 2: A stone is launched straight up by a slingshot. Its initial speed is 18.8 m/s and the stone is 1.7 m above the ground when launched. (a) How high above the ground does the stone rise? (b) How much time elapses before the stone hits the ground?

Question 3:A 1.6-kg ball tied to a string fixed to the ceiling is pulled to one side by a force to an angle of 34.2° from the ceiling. The force is pulling the ball directly right.
Just before the ball is released and allowed to swing back and forth, (a) how large is the force that is holding the ball in position and (b) what is the tension in the string?

Homework Equations



question 1: I do believe i use basic equation of vy = v0y ayt and y = y0 + v0yt + 1/2 ayt2

Question 2: Same as Question 1..

Question 3: Tension = ma + mg

The Attempt at a Solution



Question 1: I tried to get the total distance it went for the first 2.2 seconds and tried to get the rest using the 3.9 seconds, but apparently its wrong.

Question 2: I tried to get time of how long it is in the air and used that to get the distance, but i keep getting wrong answers..

Quesiton3 : I am actually kinda clueless on question 3 so help would be appreciated.
 
Physics news on Phys.org
Kaze105 said:

Homework Statement



Question 1:During a walk on the Moon, an astronaut accidentally drops his camera over a 13.8 m cliff. It leaves his hands with zero speed, and after 2.2 s it has attained a velocity of 3.3 m/s downward. How far has the camera fallen after 3.9 s?

Question 1: I tried to get the total distance it went for the first 2.2 seconds and tried to get the rest using the 3.9 seconds, but apparently its wrong

What is the acceleration from moon's gravity given by the information in the problem. Then once you have acceleration you have distance from 1/2 a t2
 
Acutally not sure as its not given
 
Kaze105 said:
Acutally not sure as its not given

Calculate it then.
 
Sorry, but how do i get the gravity for the moon? I am checking my physics book, but i can't get some value to get the graivty.
 
Kaze105 said:
Sorry, but how do i get the gravity for the moon? I am checking my physics book, but i can't get some value to get the graivty.

The information the problem gives you allows you to calculate it.
 
I don't see how i can calculate it with the information i have
 

Similar threads

Solving a Ball Thrown off a Cliff: How Long Does it Take?
  • · Replies 4 ·
Replies
4
Views
2K
Solving Slingshot Problem Homework
  • · Replies 5 ·
Replies
5
Views
4K
Tension in string when ball is at the top of a circle
  • · Replies 7 ·
Replies
7
Views
10K
Need help with mechanics exercise - Vertical motion of 3 balls
  • · Replies 2 ·
Replies
2
Views
2K
What is the impulse on the ball from the string?
  • · Replies 5 ·
Replies
5
Views
2K
Force on a pin from a pendulum and a string
  • · Replies 4 ·
Replies
4
Views
3K
Tension in a string in circular motion
  • · Replies 15 ·
Replies
15
Views
6K
Reaction between a track and a ball at a point
  • · Replies 10 ·
Replies
10
Views
3K
How far can a golf ball travel on the moon?
  • · Replies 25 ·
Replies
25
Views
17K
Circular Motion: Ball on String
  • · Replies 9 ·
Replies
9
Views
2K