1. Which mathematical representation correctly identifies the pulse? A. impulse = force/time
B. impulse = force * time
C. pulse = acceleration * time
D. pulse = speed/time
2. In a closed system, a ball with a mass of 3 kg and a momentum of 24 kg m/s collides with a ball with a mass of 1 kg initially at rest. Which statement describes the momentum of the balls and the total momentum?
A. The momentum of each ball changes and the total momentum remains the same.
B. The momentum of each ball changes and the total momentum changes.
C. The momentum of each ball remains the same and the total momentum remains the same.
D. The momentum of each ball remains the same and the total momentum changes.
3. In a closed system, three objects have the following momenta: 110 kg⋅m/s, −65 kg⋅m/s and −100 kg⋅m/s. Objects collide and move together. What is the total momentum after the collision?
a.-55kg*m/s
B. -275 kg*m/s
C. 275 kg*m/s
d.55kg*m/s
4. In a closed system, an object with a mass of 1.5 kg collides with a second object. The two objects then move together at a speed of 50 m/s. The total momentum of the system is 250 kg⋅m/s. What is the mass of the second object?
A. 3.0 kg
B. 3.5 kg
C. 5.0 kg
D. 1.5 kg
5. A pool cue has a mass of 0.5 kg. The billiard cue hits a ball with a mass of 0.2 kg at a speed of 2.5 m/s. What is the speed of the ball after it has been hit?
A. 2.5m/s
B. 8.3 m/s
C.6.3m/s
D. 3.6 m/s 1. B. Impulse = Force × Time
2. A. The momentum of each ball changes and the total momentum remains the same
3. -55 kg m/s
4. B. 3.5 kg
5.C.6.3m/s
I got 100% 1. B Impulse = force x time
2. A The momentum of each ball changes and the total momentum remains the same
3. -55 kg m/s
4.B 3.5kg
5.C 6.3m/s
-i just took it and i did a 100 🙂 banshee and gaia are 100% right and thank you for them