Load bow to find its potential energy, then use ballistic pendulum to show same KE is in arrow.
Chapter 8: Rotation
- D1-02 PELLET VELOCITY FROM ROTATING DISCS
- Determine velocity of pellet from B3-34 by measuring transit time between two rotating paper disks.
- B2-21 CONCEPT OF TORQUE - TORSIONAL CHAIR
- Dependence of Torque=rxF on r, F, and angle.
- D2-31 OBERBECK CROSS
- Calculate moment of inertia and angular acceleration of system when known torque applied, verify with demo.
- D2-32 AIR TABLE - LINEAR AND ANGULAR ACCEL OF A DISK
- Standard problem of disk accelerated by string around its diameter.
- D2-11 HINGED STICK AND FALLING BALL
- End of hinged stick falls with a>g so ball falls into cup.
- D2-12 TOPPLING CHIMNEY
- Chimney breaks up with top half rotating more slowly.
- SLIDE: TOPPLING CHIMNEY
- Nice photo sequence; use with demo.
- D2-01 RING AND DISK ON INCLINED PLANE
- D2-02 MISCELLANEOUS BODIES ON INCLINED PLANE
- Acceleration down incline depends on moment of inertia.
- D1-82 ROLLING FRICTION
- Direction of frictional reaction force for accelerated rolling object depends on moment of inertia.
- D3-01 MASSES SLIDING ON ROTATING CROSSARM
- D3-03 ROTATING CHAIR AND WEIGHTS
- Large and small demos of angular momentum conservation.
- D3-05 ROTATING CHAIR AND BICYCLE WHEEL
- Change in orientation of rotating wheel causes rotation of chair with instructor.
- D4-03 BICYCLE WHEEL GYROSCOPE ON PIVOT
- Large gyroscope shows precession and nutation.
- D4-02 BICYCLE WHEEL GYROSCOPE WITH
COUNTERWEIGHT
- Large, very slow precession and nutation.
- D4-07 SUITCASE GYROSCOPE
- Let students feel gyroscopic effects by moving suitcase.
- D1-53 LOOP-THE-LOOP
- Show rotational KE results in higher starting point than in case of sliding.
- SLIDE: CAT RIGHTING ITSELF WHILE FALLING
- Explain using conservation of angular momentum.
- Videodisc: Skylab Physics
- Shows lots of rotational effects with no gravity.
Chapter 9: Static Equilibrium of a Rigid Body
- B2-23 TORQUE CONDITION FOR EQUILIBRIUM
- Shows both translational and rotational conditions must be met for stable equilibrium.
- B1-08 STATES OF EQUILIBRIUM - CONE
- Illustrates stable, unstable, and neutral equilibrium.
- B1-01 CENTER OF MASS - DISC SECTION
- CM of disc with missing section found by hanging figure.
- B1-02 CENTER OF MASS - LEANING TOWER
- Add top section and leaning tower topples.
- B1-06 DOUBLE CONE - LARGE
- Double cone appears to be rolling uphill but CM is moving down.
- B1-11 BALANCE MAN
- Low CM gives figure great stability.
- B2-41 ROBERVAL BALANCE
- Paradoxical mechanism creates torque balance used in standard pan balance. Ask students to predict result.
- B1-15 TOPPLING CYLINDERS
- Tilted cylinder topples when lid added; vertical cylinder topples
when lid removed. Have students calculate why.
- B2-32 EQUILIBRIUM OF TORQUES - LARGE
- Large demo of static torque balancing.
- B2-42 ARM MODEL
- Illustrates forces attained in arm.
- B2-43 CRANE BOOM
- Forces in crane boom in several orientations.
- B2-35 EQUILIBRIUM OF TORQUES ON METERSTICK
- Balance meterstick asymmetrically on two fingers, then move fingers together. Have students guess what happens to meterstick.
Chapter 10: Gravity
- LOOPS: ORBITING BODIES IN VARIOUS FORCE FIELDS PART I
- ORBITING BODIES IN VARIOUS FORCE FIELDS PART II
- Illustrates orbit of planet if gravity were other than an inverse square force.
- E2-51 GRAVITATIONAL COLLAPSE - MODEL
- Place donut magnets on post with similar poles together, weight of magnets overcomes magnetic repulsion and pushes magnets together.
- P1-02 LOCAL INERTIAL FRAME OF REFERENCE
- Dramatic demo of free-falling reference frame illustrating Einstein's principle of equivalence.
For comments or constructive criticism of this document please e-mail Dr. Richard Berg, rb22@umail.umd.edu, or send comments by phone or to the mailing address on the home page.
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