Momentum and Collisions Review

What is the Law of Conservation of Momentum?

• Total momentum of a closed system increases with time

• Momentum decreases as external forces act on a closed system

• Momentum is not conserved in a closed system

• Total momentum of a closed system remains constant if no external forces act on it.

Define impulse and provide an example of its application.

• Impulse is the same as momentum and has no practical application.

• Impulse is the change in momentum of an object when a force is applied over a period of time. For example, when a baseball is hit by a bat, the force applied over a short period of time causes a change in the ball's momentum.

• Impulse is the force applied to an object, not the change in momentum.

• Impulse is only relevant in theoretical physics and has no real-world applications.

Explain the difference between elastic and inelastic collisions.

• In elastic collisions, kinetic energy is not conserved, while in inelastic collisions, kinetic energy is conserved.

• In elastic collisions, momentum is not conserved, while in inelastic collisions, momentum is conserved.

• In elastic collisions, kinetic energy is conserved, while in inelastic collisions, kinetic energy is not conserved and is transformed into other forms of energy such as heat or sound.

• In elastic collisions, the objects stick together after the collision, while in inelastic collisions, the objects bounce off each other.

Calculate the momentum of an object with a mass of 5 kg and a velocity of 10 m/s.

• 50 kg m/s

• 25 kg m/s

• 100 kg m/s

• 15 kg m/s

Describe the concept of momentum and its significance in physics.

• Momentum is the result of an object's weight and its acceleration. It is significant in physics because it determines the color of the object.

• Momentum is the product of an object's mass and its velocity. It is significant in physics because it is a conserved quantity in a closed system, and it helps to understand and analyze the motion of objects.

• Momentum is the outcome of an object's density and its force. It is significant in physics because it affects the taste of the object.

• Momentum is the combination of an object's speed and its volume. It is significant in physics because it helps in calculating the temperature of the object.

Explain the process and physics behind the egg drop project.

• Students design a contraption to protect an egg from breaking when thrown horizontally.

• The egg drop project involves understanding the concept of catapults and projectile motion.

• The physics behind it includes the study of plant biology and photosynthesis.

• The egg drop project involves understanding the concept of momentum, potential energy, and kinetic energy. Students design a contraption to protect an egg from breaking when dropped from a height. The physics behind it includes the conservation of energy and the transfer of forces during the impact.

In a collision between two objects, if one object experiences a large change in momentum, what can be said about the other object?

• The other object will experience an increase in speed

• The other object will experience a decrease in momentum

• The other object will experience no change in momentum

• The other object will also experience a large change in momentum.

What is the relationship between force, time, and impulse?

• Impulse = Force / Time

• Impulse = Force + Time

• Impulse = Force x Time

• Impulse = Time / Force

Discuss the role of momentum in car safety and the physics behind it.

• Momentum has no impact on car safety

• The physics of momentum is not applicable to car safety

• Momentum is only relevant in sports, not in car safety

• Momentum determines the force of impact during a collision and follows the principle of conservation of momentum.

How does the conservation of momentum apply to real-life situations?

• It only applies to objects in space

• It only applies to very small objects

• It helps to understand and predict the motion of objects in real-life scenarios.

• It has no application in real-life situations