Mass hanging from the roof of a moving truck. Newtons laws.

Click For Summary
SUMMARY

The discussion focuses on the application of Newton's laws of motion to a scenario involving mass hanging from the roof of a moving truck. Key equations include Fg=mg for gravitational force and Ft=ma for tension force. The user expresses confusion regarding the relationship between tension and acceleration, particularly in dynamic situations where net acceleration is present. The vertical component of tension equals the weight (mg), while the horizontal component contributes to forward acceleration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with vector components of forces
  • Basic algebra for solving equations
  • Knowledge of tension in strings and ropes
NEXT STEPS
  • Study the concept of net force and its application in dynamic systems
  • Learn about vector decomposition of forces in physics
  • Explore examples of tension in moving systems
  • Review problems involving acceleration and tension in strings
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and dynamics, as well as educators seeking to clarify concepts related to forces and motion.

cmwilli
Messages
6
Reaction score
0

Homework Statement


[PLAIN]http://img28.imageshack.us/img28/7341/capturehzm.jpg


Homework Equations


Fg=mg
Ft=ma
Ftx=Ftsin(22)
Fty=Ftcos(22)
Fg-Fty=? I realize this is probably required but I don't know where.


The Attempt at a Solution


I believe the acceleration the question is asking for is the acceleration on the tension force but I have no idea how to figure that out. I also believe I am missing an equation to substitute something else into.

The don't have a problem with static problems because you can always set something to zero but when there is net acceleration I just get confused.
 
Last edited by a moderator:
Physics news on Phys.org
The vertical component of the tension in the string = mg
The horizontal component accelerates the mass forwards.
 

Similar threads

Newton's law problem: Pushing 2 stacked blocks on a horizontal table
  • · Replies 13 ·
Replies
13
Views
3K
Understanding Newton's Third Law in Action: A Truck Pushing an SUV
  • · Replies 4 ·
Replies
4
Views
2K
Explanation for Newton II giving negative mass in my Physics lab results please
  • · Replies 44 ·
2
Replies
44
Views
4K
Rocket acceleration problem: confused about Newton's 2nd Law
  • · Replies 42 ·
2
Replies
42
Views
6K
Circular Motion and Gravitation of tether ball
  • · Replies 15 ·
Replies
15
Views
5K
Verifying that Newton's Equations are equivalent to the EL equations
  • · Replies 15 ·
Replies
15
Views
2K
Newton's law problem: Helicopter lifting a box with a rope
  • · Replies 5 ·
Replies
5
Views
3K
Newton's Second Law: Understanding Forces, Masses, and Acceleration
  • · Replies 3 ·
Replies
3
Views
2K
Mass of charged sphere suspended between charged plates
  • · Replies 4 ·
Replies
4
Views
3K
Is it friction or tension acting on the person hanging on a rope?
  • · Replies 4 ·
Replies
4
Views
1K