# Physics

A thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle and released.
What is the speed of the ball at the lowest point if L = 2.20 m, = 19.0°, and m = 500 kg?
>>>>>>>>>>>>>>>>>>>>>
How do I find the speed? The equations referenced are W=mgd(cos theta) and so I can solve for W but how do I get the velocity from that? PLEASE HELP!

The mass of the ball will cancel out and not matter. Use conservation of energy.
M g L (1 - cos theta) = (1/2) M V^2
Theta is the angle that the ball and rod are pulled away from the vertical. Is that supposed to be 19 degrees? You have some symbols missing. L(1 - cos theta) is the distance that the ball is raised in the vertical directiuon.

1. 👍 0
2. 👎 0
3. 👁 412
1. fg

1. 👍 0
2. 👎 1
posted by gfg

## Similar Questions

1. ### Physics

The figure below shows a thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle θ and

asked by Terra on July 24, 2010
2. ### Physics

A thin uniform rod has mass M = 0.5 kg and length L= 0.49 m. It has a pivot at one end and is at rest on a compressed spring as shown in (A). The rod is released from an angle θ1= 55.0o, and moves through its horizontal position

asked by Tomas on February 11, 2014
3. ### Physics/Math

A thin rod, of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass m is attached to the other end. The rod is pulled aside through an angle and released. (a)What is the

asked by Technoboi11 on March 7, 2007
4. ### physics

A thin non-uniform rod of length L=2.00 m and mass M=9.00 kg is free to pivot about an axis at one end. The CM of the rod is at a distance d=1.30 m from that end as illustrated below. The rod's moment of inertia about an axis

asked by sharkman on October 31, 2012

One end of a thin rod is attached to a pivot, about which it can rotate without friction. Air resistance is absent. The rod has a length of 0.59 m and is uniform. It is hanging vertically straight downward. The end of the rod

asked by roni on November 27, 2010
6. ### physics

One end of a thin rod is attached to a pivot, about which it can rotate without friction. Air resistance is absent. The rod has a length of 0.48 m and is uniform. It is hanging vertically straight downward. The end of the rod

asked by reghuir on April 12, 2016
7. ### Physics

One end of a thin uniform rod, 1.00m in length, is attached to a pivot. The rod is free to rotate about the pivot without friction or air resistance. Initially, it is hanging straight down (the "6 o' clock position). Then the

asked by John on December 4, 2009
8. ### Physics

A thing rod of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass 5.00kg is attached to the other end. The rod is pulled aside through an angle 30.0 degrees and

asked by Andrea on December 9, 2010
9. ### physics

A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg,

asked by janny on February 19, 2012
10. ### physics

A grandfather clock uses a physical pendulum to keep time. The pendulum consists of a uniform thin rod of mass M = 7.01 kg and length L = 0.15 m that is pivoted freely about one end, with a solid sphere of the same mass, 7.01 kg,

asked by janny on February 19, 2012

More Similar Questions