WORK AND ENERGY
ENERGY CONCEPTS
HEAT AND TEMPERATURE
ME PROBLEMS
100
Analyze the diagram. Is the Force (F) indicated in blue generating Work?
No, since is perpendicular to the displacement (d)
100
Is the International System Measurement Unit for Energy
Joules (J)
100
A unit to determine Energy which is equivalent to the the amount of Joules necesary to rise 1°C temperature of 1 grams of water.
Calorie
100
Where is the point of Maximum Kinetic Energy?
Point C
200
Is the following an example of Positive Work?
Yes, since the Force pushes on the same direction as the motion.
200
The shift between two or many different kinds of energy is known as:
a) Transfer
b) Transformation
c) Transport
b) Transformation
200
1 Cal = 4.814 J.
Convert 40 Cal to J
192.6 J
200
Apart from Point A, at which point the PE has the same Value?
Point D
300
Friction Force (Ff) is typically a force that opposes the direction of displacement (d). This will result in:
a) No Work
b) Negative Work
c) Positive Work
b) Negative Work, since is parallel to motion but goes in the opposite direction
300
The Mechanical Energy of an object at rest elevated on a certain height equals its:
a) Potential Energy
b) Kinetic Energy
c) Heat Energy
a) Potential Energy
300
When two systems at different temperatures exchange Thermal Energy, both systems will:
a) Absorb energy
b) Lose energy
c) Transfer heat until Thermal equilibrium is reached
d) Transport energy into an external system
c) Transfer heat until Thermal equilibrium is reached
300
Assuming there are no External Forces on this System. Calculate the PE at Point B.
0.4 J. PE= ME-KE
400
A Force of 300 N pushes on a parallel direction to cause a displacement of 8 m. How much is the Work (W)?
2400 J. W=Fd
400
According with Energy Conservation, it's when a type of energy moves across Systems.
a) Transfer
b) Transformation
c) Transport
a) Transfer
400
It is defined as the sum of the specific Kinetic Energy from the total amount of particles on a System.
a) Heat
b) Thermal Energy
c) Temperature
b) Thermal Energy
400
Assuming the mass of this object is 0.8 kg. Calculate the height (h) at point D. Express the result with one decimal number.
0.3 m. h= PE/m x g
500
An object falling generates a Work of 4,000 J when it falls through the first 10 m. How much was the Force of this fall?
400 N. F= W/d
500
Energy from the Sun reaches the Earth, this is an example of:
a) Transfer
b) Transformation
c) Transport
c) Transport
500
Calculate the Equlibrium Temperature when 300 mL of Water at 20°C are mixed with 400 mL of Water at 40°C.
22°C
500
Assuming the mass of this object is 0.8 kg. Calculate the Speed (v) at point C. Express the result with one decimal number.
v = 2.5 m/s. KE = √KE x 2/m