Series of True or False questions related to Forces and FBDs

AI Thread Summary
The discussion revolves around a series of true or false questions related to forces and free body diagrams (FBDs) in physics. The participant presents five scenarios involving normal forces, tension, and weight, seeking validation for their answers. The consensus confirms that the participant's answers are correct, particularly noting that the normal force can be less than the weight in certain situations. The discussion emphasizes understanding the relationships between forces in static and dynamic scenarios. Overall, the participant gains confidence in their grasp of the concepts as they prepare for their test.
Letra
Messages
2
Reaction score
0

Homework Statement



True or False (Rope does not stretch and is massless):

1. A person sits on top of a suitcase, which is_on the floor. The magnitude of the normal force of the floor on the suitcase is equal to the weight of the suitcase.
2. A bucket of milk is being pulled directly up at a constant speed (by a rope). The magnitude of tension in rope will be less than the magnitude of the weight (of the bucket of milk).
3. A person is sliding down a vertical rope attached to the top of the gym. the person's speed is decreasing. The magnitude of tension in the rope will be less than the magnitude of the person's weight.
4. A person pulls up on the handle of a suit-case which is on the floor but the person is unable to lift it. During his effort to pull, the magnitude of the normal force of floor on the suitcase is less than the weight of the suitcase
5. A person is climbing up a vertical rope attached to the ceiling. Their speed is increasing. The FBD is correct:
sMexIyV.gif


Homework Equations

The Attempt at a Solution



1. False, Fn suitcaseonman > W suitcase

2. False, Fn = W

3. False, Fn > mg-ma

4. True, Fn < W

5. False, the W component should be less than the T component

This what I believe and I'm not sure whether I'm right or wrong and I'm practicing for a test and this was on a practice. Could anybody here verify my answers and/or correct them? Thanks!
 
Last edited:
Physics news on Phys.org
Everything seems kosher.
 
  • Like
Likes Letra
Jufro said:
Everything seems kosher.

And it was. Thanks for the confirmation.
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Back
Top