Math Problem Statement

You drop a 12-g ball from a height of 1.5 m and it only bounces back to a height of 0.75 m. What was the total impulse on the ball when it hit the floor? (Ignore air resistance).

Solution

This problem involves calculating the total impulse imparted to the ball when it strikes the floor. Impulse is related to the change in momentum of the object. Let's go through the solution step-by-step.

Given:

  • Mass of the ball, m=12g=0.012kgm = 12 \, \text{g} = 0.012 \, \text{kg}
  • Initial drop height, h1=1.5mh_1 = 1.5 \, \text{m}
  • Rebound height, h2=0.75mh_2 = 0.75 \, \text{m}

Step 1: Find the velocities before and after impact.

The velocities before and after impact can be found using the kinematic energy equation, derived from the conservation of mechanical energy (ignoring air resistance):

Velocity just before hitting the floor (using h1h_1):

v1=2gh1v_1 = \sqrt{2gh_1} Where g=9.81m/s2g = 9.81 \, \text{m/s}^2 (acceleration due to gravity).

Velocity just after bouncing back (using h2h_2):

v2=2gh2v_2 = \sqrt{2gh_2}

Step 2: Calculate the impulse.

Impulse JJ is the change in momentum. Since the ball changes direction, the velocities will have opposite signs:

J=m(v2(v1))=m(v1+v2)J = m(v_2 - (-v_1)) = m(v_1 + v_2)

Now, let's compute the values:It seems like I can't do more advanced data analysis right now. Please try again later. However, if you still have questions about the problem or need a different approach explained, feel free to ask!

Would you like a detailed explanation of the process, or help with other related questions?

Here are 5 related questions that might interest you:

  1. How is momentum calculated in other types of collisions?
  2. What role does air resistance play if we don't ignore it?
  3. How does impulse relate to force over time in physics?
  4. What are other examples of conservation of energy in real-world situations?
  5. How would the impulse change if the ball had rebounded to its original height?

Tip: When working with impulse, always remember that it is equivalent to the change in momentum, not just the force applied.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Impulse and Momentum
Conservation of Energy
Kinematics

Formulas

v = sqrt(2gh)
Impulse J = m(v1 + v2)
g = 9.81 m/s^2 (acceleration due to gravity)

Theorems

Law of Conservation of Energy
Impulse-Momentum Theorem

Suitable Grade Level

Grades 9-12