Forces
- Created by: Oumie
- Created on: 25-02-19 20:06
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- Forces
- forces are measured in newtons(N)
- Resultant Forces
- Resultant forces is the overall force on a point or object
- Balanced and Unbalanced Forces
- Same size forces = balanced forces = object DOESN'T change
- NOT same size forces = unbalanced forces = objects WILL change
- Balanced forces has a resultant force of ZERO (total forces)
- Unbalanced forces DOESN'T have a resultant force of zero
- Forces only CHANGE what something is already doing
- Weight & Mass
- Weight
- measured in Newtons
- changes when gravity changes
- The force that gravity exerts on an object
- can be measured with a calibrated spring balance or newtonmeter
- Mass
- The amount of "matter" in an object
- The mass never changes
- Measured in kilograms (KG)
- Weight
- Distance, Displacement, Speed and Velocity
- Speed
- Speed is a measure of how fast you are going
- speed is a scalar
- Distance travelled (m) = speed (m/s) x time(s)
- Speed = distance/time
- Speed is measured in m/s
- Velocity
- Velocity is a vector
- Velocity is the speed something is travelling in a certain direction
- Velocity = Distance/Time
- Distance
- Distance is just how far an object has moved
- distance is a scalar
- Displacement
- displacement is a vector
- displacement measures the distance and direction in a straight line from an object's starting point to its finishing point
- Speed
- Acceleration
- Acceleration of an object is the change in its velocity per second
- Acceleration (m/s*2) = change in velocity/time taken
- to find the change in velocity you need to do Final velocity - Initial velocity/time taken
- Deceleration is a negative acceleration (when something slows down)
- Acceleration is a vector quantity because velocity is a vector
- Newton's Second Laws
- Force = Mass x Acceleration
- Greater force = Greater Acceleration (Proportional relationship)
- Greater mass = Less Acceleration (Inversely proportional relationship)
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