Work
Which of the following is a unit of work?
A. Slug
B. Dyne
C. Newton
D. Joule
D. Joule
TRUE OR FALSE:
The work-energy theorem states that work done on an object is equal to the change in the object’s kinetic energy
True.
When potential energy of a system is zero and its total mechanical energy is nonzero, then…
The system is in motion.
According to Guinness World Records, what is the second best selling book of all time?
A tale of two cities.
TRUE OR FALSE:
Work is a vector quantity because it is the product of two vectors, force and displacement.
False
What kind of mechanical energy is specifically related to a system’s position or condition?
What kinds of forces can change kinetic energy?
Both conservative and nonconservative can change kinetic energy.
What is the largest country in the world?
Russia
The SI unit of power is…
Watt.
How much will the kinetic energy of a school bus increase if its velocity is tripled?
It will be nine times greate.
If total mechanical energy is conserved during a process, then we can assume that only____ forces are exerted on the system.
Conservative.
What do you call a group of flamingos?
Flamboyance.
In theoretical physics, an ideal spring…
Has no mass.
TRUE OR FALSE:
The kinetic energy of a system is directional since it depends on the system‘s velocity, which is vector.
False.
What kind of mechanical energy does a roller coaster have halfway down its first hill?
A rollercoaster in descent has both kinetic energy and potential energy.
Who is considered the ”Father of Relativity“?
Albert Einstein.
The slope of a force-distance graph for the force exerted by an ideal spring is equal to..
The spring constant, K.
A compressed spring possesses
elastic potential energy.
Ultimately, what is the source of energy utilized in hydropower?
The total change in hydrostatic head between storage basin and the turbine discharge.
What country used approximately 4 billion miles of toilet paper each year?
China