FORCES/FRICTION Flashcards
(25 cards)
What is deceleration?
When something slows down; slows to a stop
What measuring unit is force measured in?
NEWTONS (N)
What length arrows would balanced forces be?
Same length/equal
What do unbalanced forces cause a change in?
Motion
Forces are unbalanced when?
Starts moving Speeds up Slows down Comes to a stop Changes direction
What is the definition of Inertia?
The tendency to resist any change in motion
What is the definition of Friction?
The resistance that an object encounters when moving over another
Why is friction important?
— own explanation
walking
holding something
What is a force?
A push, pull or a twist
What’s an example for push?
Push a box
What’s an example for pull?
Pull a door handle
What’s an example for twist?
Twist an elastic band
What is the mass of an object?
How much matter it contains
What is mass measured in?
Kilograms (kg) or grams (g)
Is mass a force?
No
What is weight measured with?
A spring balance
True or false
The bigger the weight attached to the spring balance, the more the spring stretches inside
True
What is acceleration?
When sometimes moves faster; speeding up
What can forces make things?
Change shape Speed it up Slow it down Stay still Moving at a constant speed (equal/balanced force)
True or false?
The arrow points the same direction as the push or pull
True
True or false?
The bigger the arrow, the bigger the force
True
What’s the definition of motion?
The action or process of moving or being moved
Friction can be reduced by what?
A lubricant
What’s the definition of traction?
The adhesive friction of a body on some surface, as a wheel on a rail
