# Physics

A 0.11- ball is placed in a shallow wedge with an opening angle of 130 degrees,for each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. Determine the Contact forces.

1. 👍 0
2. 👎 0
3. 👁 1,189
1. I assume the point of the wedge is downward, so the forces acting on the ball is gravity.

If so, then the net force down is mg. Half that acts on each wall of the wedge.

Draw the figure. the normal force at the point of contact must be N, and using the vertical, the normal, and the side of the wedge, you should have tanTheta/2=N/W so

normal force=mg/2 * tanTheta/2

check my thinking.

1. 👍 0
2. 👎 0
2. \ 130o /
\ /
\ /
\ /
\O/
/|\
C mg C
1 2

C= contact force #1 and #2.

1. 👍 0
2. 👎 0
3. First of all it's in equilibrium; therefore, x and y force components are zero.
Secondly, it's almost a classic inclined plane problem, so the angle you should use is, I'll call it T, T = (90 - Angle/2).
Thirdly, the y component is Net Fy = NcosT - W/2 = 0. Remember, for this problem, use regular coordinates, not tilted axis. Because it is a mess if you use tilted axes on both halves. W (mg)= weight. it is W/2 because you take the half of the weight.
Last, solving for N yields: mg/2cosT = .11*9.81 /(2cos(90-65)) = .595

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Precalculus

Hello, An Aircraft carrier can travel 450km in the same time a container ship travels 300km. If the aircraft carrier was traveling 5km/h faster what was the speed of the container ship? I don't need help answering the actual

asked by Kayla on January 4, 2019
2. ### Physics

I'm understanding most of this physics, but here is one last question I would appreciate help on. Thank you! Okay, so the question involves a figure. A link to the question and the picture with it is below can be found by googling

asked by Demi on March 26, 2010
3. ### Communication Class

1.Which of the following is NOT a key listening skills A. Remembering B. Responding C. Repeating D. Evaluating********* 2. Which of the following is true of listening A. It is a biological process B. It is a Voluntary process C.

asked by Nichole on October 3, 2019
4. ### Test taking Stratagies (2 questions) help me plz

1.)Which of the following is a good way to approach answering an essay question on a test? A.)Start writing your answer as soon as you have read the question B.)Jot down a rough outline before you start writing**** C.)Write as

asked by Aaliyah on January 20, 2016
5. ### HELLO

how come no ones answering my question i waiting

asked by TO: miss. sue on July 14, 2010
1. ### help

Which of the following is a good way to approach answering an essay question on a test?

asked by ? on December 17, 2015
2. ### English

Which of the following is a good test-taking strategy when answering an essay question? 1.(Think about what you want to say and create a brief bulleted list or organizer before you begin writing.) 2.Write as much as you can as

asked by Help I need somebody not just anybody on January 20, 2017
3. ### Chemistry

Hello, I'm having some trouble getting started on this question: "Calculate the volume and mass required to make 0.1 M solutions of Propionic Acid (1.0 M) and Sodium Propanoate (96.06 g/mol)" I would normally not have trouble

asked by Leo on March 3, 2015
4. ### english

1. What roles do the adults or older figures play in the lives of the various narrators? Select a figure from each of the four memoirs and write one sentence answering the question for each memoir.

asked by Kiara on September 20, 2011
5. ### Literary Analysis and Composition I

1. What roles do the adults or older figures play in the lives of the various narrators? Select a figure from each of the four memoirs and write one sentence answering the question for each memoir. Answer: 1. Barrio Boy- 2. A Cub

asked by Lilith on September 19, 2012