momentum
What is momentum?
A measure of how difficult it is to change an objects
translational motion
gravitational potential energy and depends on what
weight and height
When the speed of an object is doubled, its momentum
doubled
Defintion of Energy Transfer
Energy Moving Between Two Objects Or systems
When is momentum conserved?
All collisions with no net external force
Your body gets energy from the food that you eat. What is the form of that energy
chemical
when the speed is halfed the momentum is
halfed
What is mechanical energy?
All potential and kinetic energy in a system.
what is the equation for momentum
p=mv
Which of these describes the law of conservation of energy
Energy can neither be created, nor destroyed
How are units of momentum expressed?
kg-m/s
A 5 kg object moving at 10 m/s collides with a stationary 5 kg object. If the collision is perfectly elastic, what is the velocity of the second object after the collision?
10m/s
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other. The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s. The carts stick together when they collide. Calculate their final speed.
.5m/s
As a student walks downhill at constant speed, his gravitational potential energy
decreases and his kinetic energy remains the same
Ball A collides with ball B. The force ball A exerts on ball B ____ compared to the force ball B exerts on ball A.
How does the kinetic energy from the forward motion of a car traveling at 16 m/s compare with the kinetic energy of the same car traveling at 8 m/s?
4 times greater
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
8m/s
A launch car and target car of equal mass collided. The launch car did what after hitting the target car
stopped moving
In an experiment, a student measures the initial and final velocities of two colliding carts. Which principle is the student most likely investigating?
momentum
Determine the mechanical energy for a 5.0-kg stone perched near the edge of a cliff 25.0 m high. Use the base of the cliff as the reference level.
1225j