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INI File | 1998-02-10 | 1.0 KB | 31 lines |
- [general]
-
- [page1]
- type:1
- caption:\
- These diagrams show four different blocks sliding in different \
- directions over rough surfaces. What is the direction of the friction \
- force on each block? Drag the arrows to match the blocks to the \
- friction forces.<p>
- feedback:\
- Correct. The direction of the friction force is always opposite to \
- that of the motion. Friction opposes motion.<p>
- source:8ex1c, 8ex1a, 8ex1d, 8ex1b
- target:8ex1a1, 8ex1b1, 8ex1c1, 8ex1d1
-
- [page2]
- type:1
- caption:\
- The velocity-time graphs for three spheres falling through air are \
- shown. Each sphere reaches a different terminal velocity. Drag the \
- arrows to match each of the spheres below to the correct velocity-time \
- graph.<p>
- feedback:\
- Correct. The terminal velocity depends on the cross-sectional area and \
- mass of the sphere. The sphere with the largest cross sectional area \
- and smallest mass will have its weight balanced by air drag at the \
- lowest velocity.<p>
- source:8ex2a1, 8ex2b1, 8ex2c1
- target:8ex2b, 8ex2c, 8ex2a
-
-