1. A constant force is applied to an object over time interval t. As t increases, the magnitude of the impulse _____.
increases
decreases
remains the same
2. A system is composed of ball 1 of mass m1 and ball 2 of mass m2. Each ball is traveling at speed v, but in the opposite direction from the other ball. The total momentum of the system is m1v in the direction of ball 2. Which equation describes the relationship between m1 and m2?
m2 = m12
m2 = 0.5m1
m2 = 2m1
m2 =9m1
3. A system consists of three billiard balls. Each ball has mass m and is traveling at speed v. One ball is traveling north, another ball is traveling east, and the third ball is traveling south. What is the momentum of the system?
mv, heading west
mv, heading east
Square Root 2 mv, heading east
3mv, heading east
4. A 0.24-kg blob of clay strikes a wall with an initial velocity of 25m/s. The clay comes to a stop against the wall in 91ms What is the average impact force on the clay?
66 N
41 N
80 N
55 N
5. A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed Vi=8.4m/s. It collides in a perfectly elastic collision with a block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is Vf=2.5 m/s What is M?
6.8 kg
7.4 kg
8.8 kg
8.1 kg