balanced and unbalanced forces
Electrostatic forces
weight and Velocity
The Skeletal System
The Circulatory System
100
What is the unit of force?
Newtons (N)
100
Are the following positive, negative or neutral? - electron - proton - neutron
- negative - positive - neutral
100
what is mass?
the amount of matter that an object is made of
100
what is the biggest bone in the human body?
the femur
100
what is the function of the heart?
to pump blood around the body
200
what are balanced forces?
equal in size and opposite in direction
200
if an object has 9 protons and 11 electrons, is it positive, negative or neutral?
negative
200
what is the value of the acceleration due to gravity?
9.8m/s/s
200
How many pairs of ribs does the human body have?
12
200
what is the name of the main artery in the body?
the aorta
300
does motion occur due to balanced or unbalanced forces?
unbalanced forces
300
if two objects are both positively charged, will the attract or repel each other?
repel
300
what is velocity?
the speed and direction of an object
300
what is the function of the rib cage?
to protect the lungs, heart and other vital organs
300
where are oxygenated and deoxygenated blood found?
oxygenated - left atrium and ventricle, arteries, capillaries, pulmonary vein deoxygenated - right atrium and ventricle, veins, capillaries, and pulmonary artery
400
A group of people are playing tug-of-war. Team A is pulling in one direction with a force of 300N. Team B is pulling with a force of 400N in the opposite direction. Which team will win?
Team B
400
how can objects be transferred from one object to another?
by rubbing them together
400
what is terminal velocity?
when the downward force of the objects weight is equal to the upward force of air resistance
400
what are the bones that make up the arm?
humerus, ulna and radius
400
what are the differences between arteries, veins and capillaries?
arteries - thick and muscular, transport blood away from the heart veins - thinner and less flexible than arteries, transport blood to the heart capillaries - small and one cell thick, connect veins and arteries, deliver nutrients directly to the cells and remove wastes
500
there are two forces acting on a box, and both are working in the same direction. One force is 35N, and the other is 45N. What is the net force?
80N
500
when two objects of different charges are brought together, what do the electrons do to balance out the charges?
jump from the more negative object to the more positive object
500
describe how a skydiver experiences terminal velocity before opening his parachute
as the skydiver is free falling, there is zero air resistance si he accelerates downwards. As his speed increases, so does his air resistance. Eventually the air resistance will equal his weight and the forces will be equal
500
How many bones are in an adult human skeleton?
206
500
Describe the flow of blood through the body
right atrium > right ventricle > pulmonary artery > lungs > pulmonary vein > left atrium > left ventricle > aorta > arteries > capillaries > veins > vena cava > right atrium
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