How to Solve Newton's Laws Problems for a Decelerating Particle?

  • Thread starter Thread starter EndOfMemories
  • Start date Start date
  • Tags Tags
    Laws
AI Thread Summary
The discussion focuses on solving a physics problem involving a decelerating particle. The particle, initially moving at 25.0 m/s, is acted upon by a constant force of 15.0 N, bringing it to a stop over 62.5 m. The direction of the force is opposite to the particle's motion, which is essential for it to stop. Participants suggest using kinematic equations to calculate the acceleration and time required for the particle to halt. The original poster expresses gratitude for the guidance received in solving the problem.
EndOfMemories
Messages
6
Reaction score
0

Homework Statement



A particle is traveling in a straight line at a constant speed of 25.0 m/s. Suddenly, a constant force of 15.0 N acts on it, bringing it to a stop in a distance of 62.5 m.
(a) What is the direction of the force?
(b) Determine the time it takes for the particle to come to a stop.
(c) What is its mass?

Homework Equations



F=ma

The Attempt at a Solution



Okay, I figured out that the direction of the constant force must be opposite of the particle, otherwise the particle will never stop. I am unable to come up with way to solve the problem so if you guys can shed light on what I can do, that will be awesome
 
Physics news on Phys.org
You have one of the equations; you need to use the kinematic equations of motion for constant acceleration to find the acceleration and time.
 
Okay, thanks for the direction! I got it now.
 

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

Newton's law problem: Pushing 2 stacked blocks on a horizontal table
Replies
13
Views
3K
Average Speed Question for a Train that Accelerates and then Decelerates
Replies
20
Views
2K
Feynman's Lectures exercise about Newton's laws
Replies
13
Views
2K
Rocket acceleration problem: confused about Newton's 2nd Law
Replies
42
Views
5K
How many discs will slide off the board as it decelerates?
Replies
17
Views
1K
Closest distance of approach between 2 charged particles
Replies
5
Views
1K
Unbalanced force to find altitude of airplane
Replies
4
Views
2K
Newton's law problem: Helicopter lifting a box with a rope
Replies
5
Views
3K
Does the mass of an object affect its inertia?
Replies
6
Views
2K
Two particle system - find their angular velocities
Replies
1
Views
4K

Hot Threads

Recent Insights

Back
Top