Podcast
Questions and Answers
What is momentum?
What is momentum?
- The mass of an object divided by its velocity
- The sum of mass and velocity
- An object's weight multiplied by speed
- The product of the mass and velocity of an object (correct)
What are the units of momentum?
What are the units of momentum?
kg * m/s
To have momentum, an object can be stationary.
To have momentum, an object can be stationary.
False (B)
What two things make up momentum?
What two things make up momentum?
Momentum is a scalar quantity.
Momentum is a scalar quantity.
What happens if you increase the time during an interaction?
What happens if you increase the time during an interaction?
What happens when a moving object collides with an object at rest?
What happens when a moving object collides with an object at rest?
What is the Law of Conservation of momentum?
What is the Law of Conservation of momentum?
The greater the force acting on an object, the lesser the change in velocity.
The greater the force acting on an object, the lesser the change in velocity.
The greater the change in velocity, the lesser the change in momentum.
The greater the change in velocity, the lesser the change in momentum.
What is impulse?
What is impulse?
The greater the impulse, the lesser the change in momentum.
The greater the impulse, the lesser the change in momentum.
What does momentum have?
What does momentum have?
Momentum cannot change unless acted upon by an external force. True or False?
Momentum cannot change unless acted upon by an external force. True or False?
When a quantity doesn't change, it is described as what?
When a quantity doesn't change, it is described as what?
What is an elastic collision?
What is an elastic collision?
What is an inelastic collision?
What is an inelastic collision?
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Study Notes
Momentum Concepts
- Momentum is defined as the product of an object's mass and its velocity.
- The unit of momentum is expressed in kg * m/s.
- An object must be in motion to possess momentum; it cannot be stationary or at rest.
- Momentum consists of two primary components: mass and velocity (speed).
- Momentum is a vector quantity, meaning it has both direction and magnitude.
Impulse and Forces
- Increasing the time of force application results in a decrease of the required force.
- When a moving object collides with a stationary object, the momentum change for both is equal in magnitude.
- The Law of Conservation of Momentum states that the total momentum remains constant before and after a collision.
Effects of Force and Velocity
- A greater force acting on an object leads to a more significant change in its velocity.
- An increased change in velocity corresponds to a more considerable change in momentum.
Impulse Definition
- Impulse is defined as the product of force and the time duration over which it acts.
- A larger impulse results in a greater change in momentum.
External Forces and Conservation
- Momentum will not change unless acted upon by an external force.
- When a physical quantity remains unchanged over time, it is described as being conserved.
Types of Collisions
- An elastic collision is one where the objects collide without deformation and do not generate heat.
- An inelastic collision occurs when objects become deformed or generate heat, often resulting in them being connected post-collision.
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