Vocabulary
An object's capacity or ability to do work.
What is energy?
What is magnitude?
The work done when lifting a 5 N box for 3 m.
What is 15 J?
Book A (0.5 kg) and Book B (0.82 kg) are sat on top of the same bookshelf. This book has greater potential energy.
What is book B?
This decreases when an object slows down.
What is momentum?
An object's change in energy due to a force displacing an object.
What is "work done"?
The direction of an object's motion.
What is a vector?
The equation for finding the net momentum of a system.
What is pnet = p1 +p2.
An object has 16 Joules of potential energy at the top of a ramp. This is how much kinetic energy it will have at the bottom.
What is 16 Joules?
A dolphin and a whale are both swimming at 30 m/s. This animal has a greater momentum.
What is the whale? (greater mass)
The energy stored in an object due to its position above the ground.
What is gravitational potential energy?
This number represents the acceleration due to gravity on earth.
What is 10 m/s2? (9.8 m/s2)
The resulting value when you multiply an object's mass, acceleration due to gravity, and height.
What is gravitational potential energy?
When an object decelerates from 10 m/s to 5 m/s, this quantity decreases.
What is kinetic energy?
Two objects bounce off each other, creating this type of collision.
What is elastic?
This terms describes a collision where the objects in the system stick together.
What is inelastic?
A rule which states that a property in a closed-system will always remain constant.
This equation solves for the Kinetic Energy of a moving object.
What is KE = (1/2)mv2?
A pulley does 50 Joules of work in 5 seconds. A ramp does 56 Joules of work in 8 seconds. This machine is more powerful.
What is the pulley?
This is what happens to the force experienced during a collision when the duration (time) of a collision increases.
What is decreases?
A change in momentum.
What is an impulse?
This is what you do when finding the "change" or "difference" in value.
What is subtraction? (final-initial)
A force applied over a period of time.
What is an impulse? (change in momentum)
The efficiency of a lightbulb that converts 10 Joules of electrical energy to 7 Joules of light energy.
What is 70%?
Two objects with differing momenta collide. This describes what happens to the total momentum after the collision.
What is conserved?