Momentum Flashcards

Motion

Momentum is a measure of the ________ of an object.

It's mass

Anya knows the velocity of an object. What else does she need to know in order to find the object's momentum

6.0 kg m/s

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

40,000 kg m/s

A car has a momentum of 20,000 kg â¢ m/s. What would the car's momentum be if its velocity doubles?

9 kg

A bicycle has a momentum of 36 kg â¢ m/s and a velocity of 4 m/s. What is the mass of the bicycle?

Y, W, X, Z

The chart shows masses and velocities of four objects. Which lists the objects in order, from least to greatest momentum?

The red ball has a greater velocity than the purple ball

The chart lists the masses of four balls that have the same momentum. Which correctly compares two of the balls?

Remains the same

The law of conservation of momentum states that, if left alone, the total momentum of two interacting objects that make up a system .

It is equal to the momentum of object 1 plus the momentum of object 2.

Objects 1 and 2 collide and stick together. Which best describes the momentum of the resulting single object?

p initial = p final

Which formula can be used to express the law of conservation of momentum, where p = momentum?

The chart show the masses and velocities of two colliding objects that stick together after a collision.According to the law of conservation of momentum, the momentum of the object after the collision is ____ kg â¢ m/s.

4 kg m/s

Two carts collide and bounce apart. Cart 1 had a momentum of -6 kg â¢ m/s before the collision. Cart 2 had a momentum of 10 kg â¢ m/s before the collision.What is the total momentum of the carts after the collision?

mass

Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after the objects collide and bounce apart?

0.2 kg m/s

The diagram shows two balls before they collide. What is the momentum of the system after the collision?

action force and reaction force

According to Newton's third law of motion, which are equal?

The ball pushing the person

When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force?

The grass extends the time of the collision

Denise is riding her bike and falls to the ground. During the collision, she hits both grass and cement.

Z

The chart lists the masses and velocities of four objects. Which object requires the greatest change in momentum in order to stop its motion?

The pin pushes the bowling ball toward the left

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force

It extends the time of the collision

Football helmets are made with padding that helps reduce head injuries when a player collides with an object. Which best explains how the padding reduces injuries?

Mass

The amount of matter in an object; SI unit for measuring mass is the kilogram.

Inertia

A body at motion stays in motion unless acted on by an outside force and a body at rest stays at rest.

Momentum

Mass in motion; a measure of how hard it is to stop the object (p = m*v ---- kg x m/s).

Law of Conservation of Momentum

Momentum is not lost in a collision

Weight

A measure of the force of gravity pulling down on your body; unit for measuring weight is the Newton.

Collision

A situation in which two objects in close contact exchange energy and momentum.

Elastic collision

Two objects bounce off each other.

Inelastic Collision

Two objects sticking to each other.

Friction

Force that opposes motion between two surfaces.

Gravity

Force that pulls all objects together "closer the objects, the harder the pull" "greater the mass, larger the pull"; acceleration due to gravity is 9.8 m/s/s on earth (if it weren't for air resistance).