Definitions
Definitions Part 2
Questions
Questions part 2
Questions Part 3
100

What is momentum? 

  • Inertia in Motion
100

What changes momentum?

Impulse 

100

What is a machcine? 

  • A device for multiplying force or changing the direction of force
100

What is a satellite? 

  • Is any projectile moving fast enough to fall continually around the earth?
100

What is the Constant we use with newtons law of gravitation?

G

200

What is Power and what is the unit we use for power? 

  • Is a rate of change of work done.
  • Watt
200
What is potential Energy? 
  • Stored energy due to the position shape or state. In its stored state energy the potential for doing work.
200

True or False? Can a machine multiply energy?

False

You can not have more energy output than was input. 

200

Great force for a longer time = ________ impulse?

Same force for a shorter period of time= _______ Impulse?

Lower

Higher

200

What is the definition of Efficiency? 

  • Description of how effective a device transforms or transfers useful energy.
300

What is the definition of Work? 

  • The product of force exerted on an object and the distance the object moves.
300

What is Kinetic Energy? 

  • The energy of a moving body
300

What is weight? What is Weightlessness? 

  • Is the force exerted against a supporting floor or weighing scale.
  • Condition wherein a support force is lacking.
300

What are the Ways that we can increase momentum?

  • Applying a greater force during the same time period, Applying the same force for longer period of time, applying a greater force for a longer period of time greatly increases momentum.
300

The greater the ___________ from the earth, the less the ____________________ on an object.

  • Distance, Gravitational force
400

What is the Law of conservation of momentum? 

In the absence of external force, the momentum of a system remains unchanged.

400

What is the Law of conservation of energy? 

  • Energy cannot be created or destroyed, energy can be transformed from one form into another or objects. But the total amount of energy never changes.
400

What is a Projectile? 

Is any object that moves through the air or through space under the influence of gravity. 

400

Newton was not the first to discover gravity. Newton discovered that gravity is______________

Universal

400

What is Ellipse?

  • The oval path followed by a satellite.
500

What Is Newtons Law of Universal Gravitation? 

Everybody in the universe attracts every other body with a mutually attractive force.

500

What are the two different collisions and define them?

  • Elastic Collisions
  • When objects collide without being permanently deformed and without generating heat, colliding objects combine and bounce perfectly.
  • Inelastic Collisions
  • Both objects stick together and become distorted and generate heat when cars come together and crash.
500

Define how your weight changes in different stages In an elevator. 

  • When an elevator accelerates upward your weight on a scale is greater.
  • When an elevator accelerates downward your weight on a scale is less
  • When the elevator cable breaks, the elevator falls freely so your weight reading is zero.
  • When an elevator is still and not moving you weigh your normal weight.
500

What are the two important parts where we decide work is done?

  • A force must be applied.
  • The object must move by that force
500

What are escape speed and Velocity?

  • Escape speed- The initial speed that an object must reach to escape the gravitational influence of the earth.
  • Escape Velocity- Is escape speed when the direction is involved
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