Motion: combine the clues

Exercise and reference answers

Matching pairs

1. Left

   Equal distances at30,60:mean speed

   Right

   40 km/h

2. Left

   200mtrain+100mbridge;15m/s:time

   Right

   20 s

3. Left

   Still12,stream3;45km each way

   Right

   8 h

4. Left

   Start together;300m track;6,4m/s

   Right

   150 s

5. Left

   20km/h:6min late;30:4early:km

   Right

   10 km

6. Left

   84km;speed+7 saves1h:old speed

   Right

   21 km/h

Instructions

km/h unless m/s; track: same way, first meeting.