MOMENTUM Flashcards
(25 cards)
What do you do to the masses if an object is stated to stick?
Add the masses
What is the definition of momentum?
Momentum is the product of an object’s mass and its velocity.
What is the formula for 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 units is momentum measured in?
Momentum is measured in kilogram meters per second (kg·m/s).
What is the principle of conservation of momentum?
The principle states that in a closed system, the total momentum before an event is equal to the total momentum after the event.
Fill in the blank: In a collision, if no external forces act, momentum is ______.
conserved
If a 2 kg object is moving at 3 m/s, what is its momentum?
The momentum is 6 kg·m/s.
What is the difference between elastic and inelastic collisions in terms of momentum?
In elastic collisions, both momentum and kinetic energy are conserved; inelastic collisions conserve momentum but not kinetic energy.
True or False: During an elastic collision, the objects stick together after the collision.
False: In an elastic collision, objects do not stick together.
What happens to momentum when two objects collide and stick together?
The total momentum before the collision is equal to the total momentum after the collision.
Define impulse.
The change in momentum over time
What is the formula for impulse?
Impulse (J) is calculated as J = FΔt, where F is force and Δt is the time interval.
Fill in the blank: Impulse is equal to the change in ______.
momentum
What is the relationship between force and momentum?
The force applied to an object is equal to the rate of change of its momentum.
If a car of mass 1000 kg accelerates from rest to 20 m/s, what is its change in momentum?
The change in momentum is 20,000 kg·m/s.
True or False: A larger mass moving at a lower velocity can have the same momentum as a smaller mass moving at a higher velocity.
True.
What is the relationship between momentum and velocity for a given mass?
Momentum is directly proportional to velocity.
What does a negative momentum value indicate?
A negative momentum value indicates the object is moving in the opposite direction.
What is the total momentum of two objects with masses 3 kg and 2 kg moving at velocities 4 m/s and -2 m/s respectively?
The total momentum is 10 kg·m/s.
Fill in the blank: The law of conservation of momentum applies to ______ systems.
Closed
What is a perfectly inelastic collision?
A perfectly inelastic collision is one where the colliding objects stick together after the collision.
How does increasing mass affect momentum if velocity remains constant?
Increasing mass increases momentum.
What is the effect of external forces on momentum in a system?
change the total momentum of a system.
