InterviewSolution
Saved Bookmarks
| 1. |
Example 9.7 A girl of mass 40 kg jumpswith a horizontal velocity of 5 m s1 ontoa stationary cart with frictionlesswheels. The mass of the cart is 3 kgWhat is her velocity as the cart startsmoving? Assume that there is noexternal unbalanced force working inthe horizontal direction. |
|
Answer» no external force => momentum is constant. momentum of girl = 40 * 5 = 200 kg-m/sec momentum of girl and cart = total momentum of the girl + momentum of cart = 200 + 0 = 200 kg m/sec speed = 200 / (40 + 3) = 4.65 m/sec tq |
|