Total Mechanical Energy
The maximum speed that a falling object can attain is called its
Terminal velocity.
The mechanical advantage of all simple machines is the output force over the input force.
True
TRUE OR FALSE:
Australia is larger than the moon.
True
The moon is 3400 km in diameter, while Australia’s diameter from east to west is almost 4000 km.
Why is the terminal velocity of a 1g lead pallet higher than that of 1g of piece of paper?
The high density and spherical shape of the pellet present less surface area for air resistance to act on than does a piece of paper.
The two types of simple machines are
inclined planes and levers.
What are baby rabbits called?
Kits
What is an example of conservative force?
True or false:
A single fixed pulley magnifies force.
False.
What letter does not appear in any american state name?
There's a Z in Arizona, and an X in Texas, but no Q in any of them.
An egg dropped; it cracked and spills all over the floors. What happened to its potential energy?
It was converted into several forms of energy.
When the ideal mechanical advantage of a first-class lever equals one, then the magnitude of the net torque is
True or false:
Ketchup was once sold as medicine.
What is true?
What is the main difference between conservative force and non conservative force?
Conservative force with preserve the total mechanical energy of a system while non-conservative force will dissipate some or all of the mechanical energy as some other form of energy.
Name a safety feature on modern elevators.
Ropes stretch nonelastically, friction between moving parts, axles squeak, air resistance occurs.
How long is a jiffy?
1/100th of a second.