MCQOPTIONS
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MCQOPTIONS
| 1. |
Two identical freight cars roll without friction towards each other on a level track. One rolls at 2 m/s and the other rolls at 1 m/s. After the cars collide, they couple and roll together with a speed of ? |
| A. | 0.5 m/s. |
| B. | 0.33 m/s |
| C. | 0.67 m/s. |
| D. | none of these. |
| Answer» B. 0.33 m/s | |