click below
click below
Normal Size Small Size show me how
Force, Work, Power
Question | Answer |
---|---|
What is a force? | is anything which causes an object to move or change in velocity. |
What is unit for force? | Newtons (N) |
List 6 different types of forces | push, pull, friction, gravity, electric, mangetic |
For every force there is a______ | equal and opposite force |
What happens when forces are equal? | No movement occurs. The forces are balanced/in equilibrium |
What is the name of the state when opposing forces are balanced? | Equilibrium |
Define friction | A force that opposes the sliding motion of an object when in contact with another object |
Getting blisters from our shoes is an examples of what? | a disadvantage of friction |
Define lubrication | Reduces the friction between two surfaces in contact |
Give an example of a lubricant? | Oil |
How do you calculate work? | Work = Force X Distance |
What is the unit for work? | Joules |
A woman stands holding a box. Is she doing work? Why? | No. She is applying a force on the box but she is not moving therefore she is not working |
Define Power | the rate at which work is done |
What is the unit for Power? | Watts |
How do you calculate power? | Power = Work done รท time taken |