Forces Flashcards
What is a force
Something that changes the direction, shape or speed of an object
What are the two types of forces
Contact and non-contact forces
What does gravity do
Pulls objects to the centre of the earth
What does air resistance do
It works in the opposite to movement
What is the other name for air resistance
Drag
How do you reduce drag
Smooth the surface, lubricate it or make it more streamlined
Is friction a contact or non-contact force
It is a contact force
How do you reduce friction
Smoothing the surfaces or lubricating them
Does mass or weight remain constant
Mass remains constant and weight changes depending on then gravitational field
What is weight measured in
Newtons
What is mass measured in
Kilograms
What is mass
How much matter something is
What is weight
The force of gravity on a mass
What is a resultant force
The overall force acting on an object
If a box is being pushed 23N to the left and 37N to the right what is the resultant force
14N to the right
