Skeletal muscle | Cardiac muscle | ||
|---|---|---|---|
| 1 | The cells of skeletal muscles are unbranched. | 1 | The cells of cardiac muscles are branched. |
| 2 | Intercalated disks are absent. | 2 | The cells are joined with one another by intercalated disks that help in coordination or synchronization of the heartbeat. |
| 3 | Alternate light and dark bands are present. | 3 | Faint bands are present. |
| 4 | They are voluntary muscles. | 4 | They are involuntary muscles. |
| 5 | They contract rapidly and get fatigued in a short span of time. | 5 | They contract rapidly but do not get fatigued easily. |
| 6 | They are present in body parts such as the legs, tongue, hands, etc.![]() | 6 | These muscles are present in the heart and control the contraction and relaxation of the heart.![]() |

Figure 8.9 shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?

Two identical ball bearings in contact with each other and resting on a frictionless table are hit head-on by another ball bearing of the same mass moving initially with a speed V. If the collision is elastic, which of the following (Fig. 5.14) is a possible result after collision ?
