Forces
Push, pull, and twist are all examples of what type of force?
Applied.
Who first coined the term 'gravity'
What is sir isaac newton
An object sitting on a desk, not moving, has balanced or unbalanced forces?
Balanced
Name two categories of forces (for example, gravity versus push/upthrust)
contact and non-contact
An object will continue at the same speed in a straight line if...
...there is no external force acting on it.
Which way is friction represented when using arrows
Opposite direction of motion
An object moving at steady speed has balanced or unbalanced forces?
Balanced
What is the SI unit of force
What is Newton (N)
What law relates mass attached to a spring to extension of the spring?
Hooke's Law
Name one factor which affects friction.
What is type of surface
An accelerating object has balanced or unbalanced forces?
Unbalanced
Name three non-contact forces.
Gravity, magnetism, electrostatic
An object with an external resultant force on it will either change speed and/or...
...change direction. (Newton's Second Law)
Resistance between the soles of your shoes and the floor is helpful or unhelpful friction
Helpful
Come to the board and draw a force diagram for the following: A box is being pushed along a floor with a force of 50N, also with a friction force of 15N. Draw the box so it shows moving to the right.
Arrows starting in center of object (100)
Arrows correct length (100)
Friction opposing motion (100)
Know resultant force (100)
This force is perpendicular to a surface which an object contacts. (look at examples on boards)
Support force
"Order" question! What was the independent variable in our experiment with friction force on different materials?
Surface Material
What is the resultant force acting on an object moving at constant speed?
0N