Work and energy
Which of the following statements is true regarding a rider in a roller coaster cart moving with a constante speed through a loop?
A) the rider is accelerating
B) the sum of all the forces acting on the rider is 0.
C) gravity is the only force doing work on the rider.
A) the rider is accelerating
_____ is defined in science as the ability to move matter or change matter in some other way.
a) mass
b) energy
c) work
b) energy
YES or NO . The energy is stored in the links between the atoms.
A) YES
B) NO
A) YES
What is kinetic energy?
a) energy due to motion
b) energy that is stored
c) energy found in objects
a) energy due to motion
The quote "From all the gin joints in all the towns in all the world, she walks into mine . " Is from what movie ?
A) Casablanca
B) A walk to remember
c) Gone with the wind
A) Casablanca
In physics work occurs when a __________ acts on an object to move it some distance from the start.
A) energy
B) power
C) force
C) force
What is the name of the energy that allows the transformation of sun light in electric energy . ( conversion of a luminous particle with energy in an electrocomotive energy )
a) hydroelectric
b) electromagnetic
c)photovoltaic
c)photovoltaic
Which of the following is the best example of increasing an object's potential energy ?
a) Rolling a bowling ball
b ) turning on light bulb
c) stretching a rubber band
c) stretching a rubber band
True or false . Kinetic energy is a vector measurement because it has both a magnitude and direction .
a) True
b) False
b) False
When was John F. Kennedy's assassination ?
a) 1965
b)1964
c)1963
c)1963
A player kicks a ball with a force of 5N. The ball travels 36m. What is the total work?
A) 180J
B) 354J
C) 41J
A) 180J
Gases X and Y react in a movable chamber and it was found that the reaction increased the volume of the chamber. Assuming temperature remained constant throughout this reaction, which of the following statements is true?
a) The chamber expanded so work is done by gas Z
b)The chamber expanded so work is done on gas Z
c)The chamber expanded so heat is consumed by the reaction
a) The chamber expanded so work is done by gas Z
True or false?
Is gravitational force a conservative field
A) true
B) false
A) true
What is the formula of kinetic energy ?
a) ke = mv2
b) ke = 1/2 mv2
c) ke= pe -me
b) ke = 1/2 mv2
When did Jackie Robinson started playing in the Mayor Leagues of Baseball?
a) April 1947
b) April 1948
c) 1938
a) April 1947
What is the formula for work ?
a) w= force * distance
B) w= distance / force
c) w= force / distance
a) w= force * distance
What kind of energy conversion occurs during the photosynthesis of plants?
a) electromagnetic to electric
b) radiant to potential
c) light energy to chemical
d) light energy to chemical potential
d) light energy to chemical potential
The strength of the resort is conservative and its potential energy is known from :
a) EP =1/2 K x^2
b) EP= 1/2 x^2
c) EP = mgh
a) EP =1/2 K x^2
Who discovered the kinetic energy ?
a) Aristotle
b) Platou
c)William Thomson
c)William Thomson
Cuando debutó Alejandro Iñarritú como director y con qué película ?
a) 1985 To kill a mocking bird
b) 2000 Amores Perros
c) 2015 , Revenant
b) 2000 Amores Perros
When a body falls freely under gravity, then the work done by the gravity is :
a) positive
b) negative
c) zero
a) positive
If the internal energy of a system is decreased, which of the following is impossible?
a)Work done on the system is smaller than heat absorbed.
b) Work done by the system is larger than heat released.
a)Work done on the system is smaller than heat absorbed.
Who discovered potential energy ?
a) Newton
b) Aristotles
c) Galileo Galilei
d) John Macquorn Rankine
d) John Macquorn Rankine
A 3-kg toy cart is moving at 4 m/s. Calculate the kinetic energy of this cart if it were moving TWICE as fast. ____J
a) 84
b) 96
c) 74
b) 96
Cuántos minutos Eddie registró como jugador profesional ?
a)485
b) 311
c)456
d) 500
b) 311