本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学
[单选题]
The diagram below shows a tennis a)*u 5ne z nyf( jp;ydzi),3rvball of ma wb h zqd8so7j+0 +h6bwss $m$ striking a wall with an initial velocity, $u$, and rebounding with velocity $v$ . A second, softer ball of the same mass strikes the wall with the same speed but rebounds with a slower rebound speed.
Which of following statements is correct about the magnitudes of the impulse and change in momentum applied to the second ball compared to the first?
A. Impulse is geater; change in momentum is smaller
B. Impulse is smaller; change in momentum is greater
C. Impulse is gteater; change in momentum is greater
D. Impulse is smaller; change in momentum is smaller
参考答案: D
本题详细解析:
Explanation:The change in momentum and impul 0y./ncz korf9u 9pcu4a)7hilse applied to the ball are equal, because the impulse.krflcu907 p9u yo/n c 4i)zha is defined as the change in momentum. Increasing one is the same as increasing the other and vice-versa. The slower rebound speed of the second ball causes a decrease in the magnitude of the impulse since the change in momentum is smaller if the final speed v$v$ is smaller. $I = \Delta p = m(v - -u) = m(v + u)$
| 
