Momentum
An object’s momentum depends on these two properties of the object.
What are mass and velocity?
Impulse is the result of a force applied over time. If the time increases, this happens to the force needed to produce the same impulse.
What is it decreases?
When a goalkeeper catches a fast-moving soccer ball, they pull their hands back to reduce this.
What is the force of impact?
Doubling the velocity of an object causes its momentum to change by this factor.
What is it doubles?
According to Newton’s Third Law, when a gun fires a bullet, the gun recoils because of this law.
What is the conservation of momentum?
If two objects have the same momentum but different masses, this must be true about their velocities.
What is the object with less mass has a higher velocity?
When you jump off a table and bend your knees upon landing, this effect reduces the impact force on your body.
What is increasing the time of contact?
In boxing, a “padded glove” reduces injury by increasing this quantity during a punch.
What is the time of impact?
A 2-kg object moving at 3 m/s and a 1-kg object moving at 6 m/s have this comparison in momentum.
What is they have equal momentum?
Newton’s Second Law connects force, mass, and acceleration, but it can also be rewritten to connect force to this change in an object’s motion.
What is the change in momentum?
A large truck and a small car are moving at the same speed. The truck has more momentum because of this reason.
What is it has a greater mass?
A fast-moving object collides with a wall and comes to a stop. The impulse is the same whether the collision is elastic or inelastic, but this aspect of the collision differs.
What is the time duration of the collision?
When a rocket launches, it pushes exhaust gases downward. This motion is explained by the conservation of this physical quantity.
What is momentum?
If a force acts on an object for three the time, the impulse delivered will change by this factor.
What is it triples?
In an isolated system with no external forces, this principle ensures that momentum before and after a collision remains constant.
What is the law of conservation of momentum?
When no external forces act on a system, the total momentum before and after an event, like a collision, stays the same due to this principle.
What is the conservation of momentum?
To maximize the impulse when hitting a baseball, players do this action with their swing to increase the force applied over time.
What is following through?
A person using a trampoline bounces higher when they bend their knees before jumping because this helps maximize impulse.
What is increasing the time over which force is applied?
In a collision between two objects, if one object slows down, the other object must do this to conserve momentum.
What is speed up or gain momentum?
In physics, impulse is described as the area under this type of graph.
What is a force vs. time graph?
If an object’s momentum changes, this must have happened to either its mass, its velocity, or both.
What is a force acted on the object?
During a car crash, airbags work to reduce injuries by increasing this quantity, which reduces the force felt by passengers.
What is the time of impact?
In vehicle safety, crumple zones are designed to protect passengers by absorbing energy and increasing this factor during a collision.
What is the time of deceleration?
Two ice skaters push away from each other. If one skater is twice as massive, their velocity will compare in this way to the lighter skater.
What is the heavier skater moves with half the velocity?
When analyzing collisions, this property of a system ensures that momentum remains conserved, even if forces are exchanged internally.
What is the system being isolated (or free from external forces)?