Forces Flashcards
Name the contact and non-contact forces
Contact : Friction
Non-Contact : Magnetic Force, Gravitational Force
What is the Si unit of Force or Weight
Newton (N)
What is the SI unit of mass
Kilogram
What is weight?
Gravitational force exerted on an object
What is mass?
Amount of matter in an object
Which changes w location, mass or weight?
Weight. Mass remains constant regardless of location
State the changes in the sate of rest/motion of an object
- move a stationary object
- change the speed of an object
- change direction of movement
- stop a moving object
What is pressure
Force exerted per unit area
What are the factors affecting pressure
- area of contact
- force
what is the formula for pressure
pressure = Force (N) / Area (m^2)
what is the unit for pressure
Pascal (Pa)
What is work done
an example of
energy transfer that occurs when an object
moves in the direction of a force
what is the SI Unit of work and energy?
Joule (J)
For work to be done on an object, what conditions must be satisfied?
- force must be applied on the object
- object moves
- object moves in the same direction as the force applied on it
What does it mean when energy is conserved
Energy is not created nor destroyed, and is conserved when transferred from one object to another, or converted from one form to another
What are some sources of energy
- Fossil fuels
- Solar energy
- Hydroelectric energy
- wind energy
- Geothermal energy
- Biofuels
- Nuclear energy
