Momentum Flashcards
(25 cards)
What is the definition of momentum?
Momentum is the product of an object’s mass and its velocity.
What is the formula for calculating momentum?
The formula for momentum (p) is p = mv, where m is mass and v is velocity.
True or False: Momentum is a scalar quantity.
False: Momentum is a vector quantity.
What unit is momentum measured in?
Momentum is measured in kilogram meters per second (kg·m/s).
Fill in the blank: The law of conservation of momentum states that in a closed system, the total momentum _______.
remains constant.
What happens to momentum during a collision?
Momentum is conserved in collisions, provided no external forces act on the system.
What type of collision conserves both momentum and kinetic energy?
An elastic collision.
What type of collision conserves momentum but not kinetic energy?
An inelastic collision.
True or False: A stationary object has momentum.
False: A stationary object has zero momentum.
If a car with a mass of 1000 kg is moving at a velocity of 20 m/s, what is its momentum?
The momentum is 20,000 kg·m/s.
What is impulse?
Impulse is the change in momentum of an object when a force is applied over time.
What is the relationship between impulse and momentum?
Impulse is equal to the change in momentum (Impulse = Δp).
Fill in the blank: The formula for impulse is _______.
Impulse = Force × Time.
True or False: Increasing the time over which a force is applied will decrease the impulse.
False: Increasing the time will increase the impulse.
What is the effect of mass on momentum?
Increasing mass increases momentum if velocity remains constant.
What does the term ‘center of mass’ refer to?
The center of mass is the point in an object or system where mass is evenly distributed.
What is the momentum of an object at rest?
The momentum of an object at rest is zero.
True or False: An object moving in a circular path at constant speed has constant momentum.
False: An object moving in a circular path has changing momentum due to changing direction.
What is the principle of conservation of momentum used for in sports?
It is used to analyze the motion of colliding athletes or equipment.
Fill in the blank: In a perfectly elastic collision, both momentum and _______ are conserved.
kinetic energy.
What happens to the momentum of two objects after a perfectly inelastic collision?
They stick together and move with a common velocity.
If two objects collide and stick together, what type of collision has occurred?
A perfectly inelastic collision.
What is the total momentum of two objects, one with 5 kg moving at 3 m/s and the other with 10 kg moving at 1 m/s?
The total momentum is 25 kg·m/s.
True or False: Momentum can be transferred from one object to another.
True: Momentum can be transferred during collisions.
