What is the Speed of a Ball at its Highest Point Using Conservation of Energy?

Thread starter Bones
Start date Oct 15, 2008
Tags

Conservation Conservation of energy Energy

AI Thread Summary

The discussion focuses on calculating the speed of a ball at its highest point using the conservation of energy principle. The ball, with a mass of 0.40 kg and an initial speed of 9 m/s at a 29° angle, requires the application of energy conservation equations. The participant initially expresses uncertainty about the correct approach but later confirms they have figured out the solution. The relevant equation involves the work of non-conservative forces equating to the change in kinetic and potential energy. The conversation highlights the importance of understanding energy conservation in projectile motion problems.

Oct 15, 2008

Bones

Homework Statement

0.40 kg ball is thrown with a speed of 9 m/s at an upward angle of 29°.
(a) What is its speed at its highest point? (Use conservation of energy.)

Homework Equations

Work of non conservative forces = change in KE + change in PE

The Attempt at a Solution

I am not sure how to go about this.

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Oct 15, 2008

Bones

Is this equation correct? 0=-1/2(0.40kg)(v^2)+(-(0.40kg)(9.8m/s^2)h

Oct 15, 2008

Bones

I figured it out ;)

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