What is force?
a push or a pull
In a balanced force will an object move
In a unbalanced force will an object move
The unit we use to measure force is
there are ___ grams in one newton
What 3 conditions must be met in order for work to be done?
FORCE APPLIED , OBJECT MUST MOVE, OBJECT MUST MOVE IN DIRECTION THE FORCE IS APPLIED
A force can be exerted on an object without work being done because
SINCE FORCE IS WORK TIMES DISTANCE, IF THE OBJECT DOES NOT MOVE THEN THE DISTANCE WOULD BE ZERO AND ANYTHING TIMES ZERO IS ALWAYS ZERO
Carrying an object that weighs 35 grams a distance of 1 km IS/IS NOT an example of work being done because
IS NOT WORK BECAUSE LIFTING AND HOLDING THE BOX UP IS AN UPWARD FORCE WHILE WALKING IS A HORIZONTAL FORCE SO THE APPLIED FORCE AND THE MOVEMENT OF THE OBJECT ARE IN OPPOSITE PLANES
The formula for finding work is
FORCE x DISTANCE.
The unit we use to measure work is
NEWTON-meters OR JOULES.
The formula for finding power is
WORK ÷ time.
The unit we use to measure power is
WATTS, JOULES/second OR NEWTON-meters/second.
What device makes work easier by changing the direction or the amount of force?
Machines can be classified as either ____ OR _______ machines.
lever is made up of these four parts
RESISTANCE FORCE OR ARM,
EFFORT FORCE OR ARM, FULCRUM, & A PLANK/BAR.