Conservation of Momentum Quiz

QuizÂ by sean

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11 questions
• Q1
During a lab experiment a student collides one car into another and observes that they stick together. What answer best describes the momentum, kinetic energy, and velocity change?
Momentum is conserved, Kinetic energy is conserved, and velocity is decreased.
Momentum is Conserved, Kinetic energy is not conserved, and velocity is decreased.
Momentum is not Conserved, Kinetic energy is not conserved, and velocity is decreased.
45s
• Q2
A 5 kg clay blob moving 6 m/s collides with a 2 kg box that is at rest. Upon collision the clay and box stick together. What is the speed of the objects after they collied?
5 m/s
4.3 m/s
7 m/s
30 m/s
120s
• Q3
What is conserved in an elastic collision?
Momentum and Kinetic Energy
Kinetic energy
Momentum
45s
• Q4
What is conserved in an inelastic collision?
Momentum and Kinetic Energy
Kinetic Energy
Momentum
45s
• Q5
Two balls, one weighing 10 newtons and the other 20 newtons, are both dropped form 40 meters in the air. Which ball will have greater momentum after 9 seconds. Hint: You don't need to do any calculations, just look at the equation for momentum P=Mmv
The ball weighing 10 newtons will have greater momentum after 9 seconds.
The ball weighing 20 newtons will have greater momentum after 9 seconds.
45s
• Q6
Two cars both moving 100 meters per second but going opposite directions collide. What is true about the momentum of the two car system before and after the collision?
The momentum is less after the collision.
The momentum is greater after the collision
The momentum is the same before and after the collision
45s
• Q7
A 5 kg object moving 3 m/s and an 15 kg object moving 2 m/s collide. What is the momentum of the two object system?
30kgm/s
15 kgm/s
45 kgm/s
120s
• Q8
A ball moving 5m/s collides with a a second ball at rest. If the collision is elastic which of the following statements best describes the balls after the collision?
The ball moving 5m/s will move through the ball at rest
The ball moving 5m/s will stop moving and the other ball will move off at 5 m/s.
Both balls will stick together and move off with a velocity of 2.5m/s
45s
• Q9
A rocket is propelled into the air by ejecting hot gas in the opposite direction. This is an example of what law of physics?
Conservation of heat
Conservation of momentum
Conservation of energy
Conservation of mass
45s
• Q10
If the speed of a moving object is doubled, which quantity will also be doubled?
Momentum
Kinetic Energy
Acceleration
45s
• Q11
What is the force exerted on an object if it is hit by a 5,000 kg truck moving 3m/s for a time of 2 seconds?
3,333 Newtons
7,500 newtons
15,000 newtons
120s

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