Simple Concept Question Regarding Impulse and Momentum

Click For Summary
SUMMARY

The discussion centers on the physics concepts of impulse and momentum, specifically in the context of an egg breaking upon impact with different surfaces. The correct answer to the question posed is C: Maximum Force, as the egg experiences a larger force over a shorter time when dropped on a hard surface compared to a softer surface like a pillow. The relationship between impulse (force multiplied by time) and the resulting force experienced by the egg is crucial in understanding why the egg does not break on the pillow. The key takeaway is that a smaller force applied over a longer duration results in less damage than a larger force applied over a shorter duration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of impulse and momentum
  • Basic knowledge of force-time relationships in physics
  • Ability to apply equations of motion in practical scenarios
NEXT STEPS
  • Study the relationship between impulse and momentum in greater detail
  • Explore Newton's laws of motion and their applications in real-world scenarios
  • Learn about the effects of different surfaces on impact forces
  • Investigate practical examples of impulse in sports or engineering contexts
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in understanding the principles of impulse and momentum in practical applications.

etherealcalc
Messages
3
Reaction score
0
It's simple to everyone but me haha
1. Homework Statement

We toss an egg onto the floor, and it breaks. We toss an egg onto a pillow on the floor, and it does not break. The egg that does not break experiences a smaller:
A. Impulse
B. Change in momentum
C. Maximum Force

Homework Equations


Ft=delta(p)

The Attempt at a Solution


A and B are the same answer, so if I were to just want to find the answer, it would be C by POE because they both can't be right. However, I thought impulse was the reason that the egg/pillow combo doesn't shatter the egg, because there's more time. Is it C because impulse implies that the egg had to bounce a bit up, and it doesn't do that, it just shatters?
 
Physics news on Phys.org
etherealcalc said:
A and B are the same
Right.
etherealcalc said:
Is it C because impulse implies that the egg had to bounce a bit up
No.
Impulse is force times time (as an integral). What is likely to break an egg, a small force for a long time or a large force for a short time? Which would you prefer to be subjected to?
 
  • Like
Likes   Reactions: Abhishekoo7
Perhaps think about the effect the pillow has on the stopping distance. Apply the equations of motion to think about the deceleration and Newtons law get the force.

Edit: c says maximum force.
 
haruspex said:
Right.

No.
Impulse is force times time (as an integral). What is likely to break an egg, a small force for a long time or a large force for a short time? Which would you prefer to be subjected to?
I would think either would break an egg, but couldn't a small force for a longer time possibly be a smaller impulse?
 
etherealcalc said:
I would think either would break an egg, but couldn't a small force for a longer time possibly be a smaller impulse?
Consider a given impulse spread over either a short time or a long time. If spread (evenly) over a long time then the peak force is small; if only taking a short time the force must be large.
For a small force, consider, say, the weight of a fly, about 10-4N. If a fly sits on an egg for a year, what is the impulse? Could it break the egg?
What about the same impulse spread over 1ms?
 
  • Like
Likes   Reactions: bornofflame

Similar threads

Replies
14
Views
3K
  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 24 ·
Replies
24
Views
4K
  • · Replies 11 ·
Replies
11
Views
4K
Replies
5
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
3K