Semester 2 Exam 2016 Flashcards
How do you find a mechanical advantage of a lever?
You divide the load by the effort applied.
MA=LOAD divided by EFFORT.
Which class levers are force multiplier?
1st and 2nd class levers are force multipliers.
Which class levers are speed multiplier?
3rd class levers are speed multipliers.
What is an inclined plane?
An inclined plane is a surface that is set at an angle to the horizontal.
How does an inclined plane give us a mechanical advantage?
Hight of inclined plane Divided by distance of slope(or effort divided by load).
What is a wheel and axel?
A wheel and axel is a lever that can rotate.
How do you find the mechanical advantage of a pulley?
You divide the effort by the amount of ropes directly attached to the load.
What are gears?
Gears are a wheel and axel with teeth.
What does MRS GREN stand for?
Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.
How do we calculate a gear ratio?
Divide the number of teeth on the driving gear by the number of teeth on the driven gear.
Driving divided by driven.
How and why do scientist use classification?
To group organisms and talk about them.
What is biology?
Biology is the study of living things.
What is ecology?
The study of ecosystems.
What is a population?
A group of organisms that can interbreed.
What is an environment?
The surroundings in which an organism lives and operates.
