Rectilinear Motion Take-Home Exam - DEAD END

AI Thread Summary
The discussion revolves around a student seeking urgent help with a take-home exam on rectilinear motion, specifically struggling with four problems due in 12 hours. The student questions whether the mass of a block is necessary to calculate the minimum stopping distance, which involves normal force and static friction. A response clarifies that the normal force can be expressed in terms of mass, indicating it will cancel out in the calculations. The urgency of the situation highlights the pressure students face with tight deadlines and complex physics concepts. Overall, the thread emphasizes the importance of understanding fundamental principles in physics problem-solving.
mizzou0222
Messages
4
Reaction score
0
Hi everyone.

I'm in crisis mode over this take-home exam I have due in 12 hours. I've posted the 4 problems I'm stuck on and ANY help would be a life-saver.

I can get all of them setup, but am completely clueless as to how to actually execute them.


I have a few questions in specific:

[Question 2] To determine the minimum stopping distance, wouldn't I need to know the mass of the block in order to calculate the normal force and, by extension, the force due to static friction?

[Question 5] ...what?
 

Attachments

Physics news on Phys.org
mizzou0222 said:
[Question 2] To determine the minimum stopping distance, wouldn't I need to know the mass of the block in order to calculate the normal force and, by extension, the force due to static friction?

No. Express the normal force in terms of m. It will cancel.


ehild
 
Thread 'Collision of a bullet on a rod-string system: query'

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...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How can we model a rolling truck on an incline using rotational motion analysis?
Replies
24
Views
2K
Testing How to not get stressed on the actual exam?
Replies
18
Views
644
Understanding the Forces Behind Part B of the Graph
Replies
10
Views
2K
Circular Motion: What's the Source of Centripetal force in this?
Replies
33
Views
7K
Relationship between Rectilinear and Angular Motion
Replies
3
Views
4K
How does rotational motion influence static friction?
Replies
7
Views
3K
Circular Motion With Constant Angular Acceleration
Replies
3
Views
2K
Magnetic Flux Questions from Japanese University Exam Papers
Replies
7
Views
2K
In search of a non-linear way to prepare students for this unique exam
Replies
2
Views
3K
The physics of billiards. (Describing the motion)
Replies
9
Views
3K

Hot Threads

Recent Insights

Back
Top