Forces and Acceleration Flashcards
Who worked out the Laws of Motion? and when?
Isaac Newton in the 1660s.
An object needs what to start moving?
A resultant force.
If the resultant force on a stationary object is zero what will the object be doing?
Object will remain stationary.
What does no resultant force mean?
No change in velocity .
If there is no resultant force on a moving object what will happen to the object?
Carry on moving at the same velocity.
If a train/car/bus is moving at a constant velocity then what must the forces be?
Forces must be all balanced.
To keep going at a steady speed what must there be>
Zero resultant force.
What does a resultant force mean?
Acceleration.
If there is a non-zero resultant force what will happen to the object?
It will accelerate in the direction of the force.
A non-zero resultant force will always produce what?
Acceleration/deceleration.
The “acceleration” can take 5 different forms
What are they?
Starting. Stopping. Speeding up. Slowing down. Changing direction.
When an object is accelerating what will the arrows be like?
Unequal.
If there’s an overall force it will always…
Accelerate .
You get steady speed when there is…
Zero resultant force
