Table of Mechanics Demonstration

List of Mechanics Equipment & Supplies

Lecture Demonstrations

Nose Basher, 1M40.10

Topic and Concept:

Location:

NoseBasher01-400.jpg

Abstract:

A bowling ball pendulum is held against the nose and allowed to swing out and back.

Equipment

Location

ID Number

Bowling Ball

ME, Bay A7, Shelf #1

Wire with Clip

In Lecture Halls

Important Setup Notes:

Setup and Procedure:

  1. Suspend wire from the D-bracket in the ceiling.
  2. Clip the bowling ball onto the wire.
  3. Have a volunteer stand with his or her back to the wall.
  4. Tell the volunteer that it is very important not to move at all during this demonstration.
  5. Have the volunteer bring the bowling ball up to his or her nose and release from rest.

Cautions, Warnings, or Safety Concerns:

Discussion:

When the bowling ball is brought to the volunteer's nose, it is given gravitational potential energy. Since it is not yet moving, the total energy of the ball is just the potential energy. Assuming energy losses due to friction and air resistance to be negligible, this energy must be conserved as per the Law of Conservation of Energy. Thus the ball will reach the same height upon its return to the volunteer. Since there is some energy losses, the ball won't be able to reach the same height and so will be a little further from the volunteer's nose than it had started.

NoseBasher03-250.jpg

BallsWires02-250.jpg

BowlingBall01-250.jpg

BowlingBall02-250.jpg

NoseBasher07-250.jpg

Wires01-250.jpg

Wires02-250.jpg

Wires03-250.jpg

NoseBasher10-250.jpg

HangingRod06-250.jpg

NoseBasher06-250.jpg

CeilingMount01-250.jpg

Videos:

References:

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