a machine consisting of a beam or rigid rod pivoted at a fixed point
What is lever
100
the rate at which someone or something is able to move
What is speed
100
who found the laws of motion
What is Sir Isaac Newton
200
the natural force of attraction exerted by a celestial body such as the earth upon objects at or near its surface ,tending to draw them towards the center of the body
What is gravity
200
it takes certain amount of ____ to push or pull a object
What is energy
200
a _____ and _____ is a simple a machine made up of two circular objects of different size .
What is wheel and axel
200
The ___ symbol J is a derived unit of energy, work or amount of heat in the international system of units
What is a Joule
200
Sir Isaac Newtons religon was
What is christian
300
work has a more definite meaning which is work is force x_____
What is distance
300
a ____ is a wheel on an axle that is designed to support movement of a cable or a belt along its circumference
What is a pulley
300
______ is the rate of change of the position of an object.
What is velocity
300
the first law of motion says an object at rest tends to stay at rest or a object at motion tends to stay at motion unless acted upon by a ____ force.
What is outside
400
to make work easier we use ______
What is machines
400
A _____ is a flat supporting surface tilted at an angle with one end higher than the other . Used as an aid for raising or lowering a loud .
What is an inclined plane
400
in physics _______ is one of the basic quantitative properties describing a physical system or objects state .
What is energy
400
Newtons second law says acceleration is produced when a _____ acts on a mass. The greater the mass the greater the amount of ___ needed
What is force
500
in physics, a _____ is any influence that causes an object to undergo a certain change , either concerning its movements
direction or geometrical construction .
What is force
500
a teacher applies a force of 50N to move a students bag 10M . how much work is done ???
What is 500J
500
A _____ is a type of fastener characterized by a helical ridge know as an external thread wrapped around a cylinder
What is a screw
500
a vigorous or determined attempt
What is effort
500
Newtons third law says that for every action there is a ___ and ____ re -action