Ch7_solomonk

Check your understanding: 1. a) 540kgm/s east b) 20000kgm/s north c) 80 kgm/s south 2. a) 40000 b) 60000 c) 40000 d) 80000 3. a) The tight end travels twice the distance of the lineman in the same amount of time. Thus, the tight end is twice as fast ( **vtight end = 6 m/s** ). The halfback travels three times the distance of the lineman in the same amount of time. Thus, the halfback is three times as fast ( **vhalfback = 9 m/s** ). b) Both the **halfback and the tight end** have the greatest momentum. The each have the same amount of momentum - **540 kg*m/s** . The lineman only has 360 kg*m/s.
 * Summary of Chapter 7 lesson 1a 3/7/12**
 * Momentum**
 * mass in motion
 * symbol - p
 * p = (m)(v)
 * units - kgm/s
 * vector quantity
 * an object has a large momentum if either its mass or its velocity is large