Inelastic Collisions 11/19/98

I. Perfectly Inelastic Collisions

　

1. Prepare and weigh the gliders and masses:

　

Object

Mass ( )
Glider with pin 　
Glider with plug 　
masses 　 　 　 　 　 　

　

2. Set up timing photogates:

The lengths of gliders should be the total length which the photogate can detect.

The length of Glider with pin = ___________________

The length of Glider with plug = _________________

3. Make measurements: (Just fill in the data)

  1. One glider initially at rest, the other started by the launcher

    2. The positive velocities are measured to the right

    m1

    (kg)

    m2

    (kg)

    V1i

    (m/s)

    V2i

    Vf

    Pi

    (Kg.m/s)

    Pf

    D P

    Ki

    ( J)

    Kf

    D K
    　 　 　 　 　 　 　 　 　 　 　
    　 　 　 　 　 　 　 　 　 　 　
    　 　 　 　 　 　 　 　 　 　 　
    　 　 　 　 　 　 　 　 　 　 　
    　 　 　 　 　 　 　 　 　 　 　
  2. Both gliders started by the launchers

　

m1

(kg)

m2

(kg)

V1i

(m/s)

V2i

Vf

Pi

(Kg.m/s)

Pf

D P

Ki

( J)

Kf

D K
　 　 　 　 　 　 　 　 　 　 　
　 　 　 　 　 　 　 　 　 　 　
　 　 　 　 　 　 　 　 　 　 　
　 　 　 　 　 　 　 　 　 　 　
　 　 　 　 　 　 　 　 　 　 　

　

4. Answer the questions.

　

　

　

　

　

　

　

　

　

II. Other inelastic collisions

1.

　

m

(kg)

Vi

(m/s)

Vf

Ki

( J)

Kf

D K

(D K/ Ki )x100%
　 　 　 　 　 　 　
　 　 　 　 　 　 　
　 　 　 　 　 　 　
　 　 　 　 　 　 　
　 　 　 　 　 　 　

　

2. Plot D K vs. Ki .

　

3. Answer the questions.