Using the momentum of the ball to find it's original height

Click For Summary
SUMMARY

The discussion focuses on calculating the original height from which a 0.150 kg ball was dropped, given its momentum of 0.780 kg·m/s just before impact. The correct approach involves using the formula for momentum (p = mv) to find the velocity, followed by applying the kinematic equation for free fall. The calculated height is confirmed to be approximately 1.38 meters, demonstrating the application of physics principles in solving real-world problems.

PREREQUISITES
  • Understanding of momentum and its formula (p = mv)
  • Basic knowledge of kinematics and free fall equations
  • Familiarity with gravitational acceleration (g = 9.8 m/s²)
  • Ability to manipulate algebraic equations for solving physics problems
NEXT STEPS
  • Study the derivation and application of the kinematic equations for free fall
  • Learn about energy conservation principles in physics
  • Explore the relationship between momentum and kinetic energy
  • Investigate real-world applications of projectile motion
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of motion and energy conservation.

deadtreforest
Messages
6
Reaction score
0
A 0.150 kg ball is dropped from rest. If the magnitude of the ball's momentum is 0.780 kg·m/s just before it lands on the ground, from what height was it dropped?
 
Physics news on Phys.org
What have you tried? What equations do you think you might need? You must show some effort in order to get help.
 
i used kg m/s / kg

.78/.15=5.2

m/s /g

5.2/9.8= .53

1/2 g (m/s /g)^2=m

1/2x9.8x.53^2=1.38

it said that i got it right
 
Last edited:

Similar threads

  • · Replies 13 ·
Replies
13
Views
1K
Replies
7
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 38 ·
2
Replies
38
Views
4K
Replies
14
Views
4K
  • · Replies 10 ·
Replies
10
Views
2K
Replies
34
Views
3K
  • · Replies 6 ·
Replies
6
Views
5K
  • · Replies 2 ·
Replies
2
Views
2K