Worksheetsenergy power and work
Total questions: 20
Worksheet time: 8mins
We calculate the mechanical work by the formula
W = F * d
p = mv
s = d/t
t = d/s
We measure work in:
kilograms
joules
watts
newtons
The unit of energy in the SI system is
kilogram
newton
joule
watt
which of the following physical quantities is one of the types of energy
nuclear energy
kinetic energy
potential energy of elasticity
all the answers are correct
Potential gravity energy is the energy associated with
body movement
energy changes occurring inside the body
the position of the body in the field of gravitational forces
elastically deforming body
How do we calculate power?
power = time ÷ work done
power = work done ÷ time
power = work done x time
How do we calculate gravitational potential energy on Earth?
Weight x height
Mass x height
Force x height
How do we calculate kinetic energy?
m x v2
0.5 x m x v2
distance ÷ time
Work is a form of energy.
True
False
A Watt is the standard metric unit of work.
True
False
A kg•m2/s2 would be a unit of work.
True
False
Power is a time-based quantity.
True
False
what is potential energy?
energy that it possesses due to its motion.
this energy is the potential of a chemical substance to undergo a chemical reaction to transform into other substances.
energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
Strictly speaking, a car will burn more gasoline if the car radio is turned on. This statement is _____.
Totally false.
True only if the car's engine is running
True only if the car's engine is stopped.
Always true
what is kinetic energy ?
Energy of the body associated with the movement of its mass. The unit is joule. In systems described by classical mechanics, there can be transformations into potential energy and vice versa.
Energy carried by atoms.
Most abundant energy resource on Earth. It can be captured and used in several ways, and as a renewable energy source, is an important part of our clean energy future.
What is the definition of work?
force x acceleration
mass x displacement
force x displacement
mass x acceleration
Energy is the ability to do work.
True
False
Which of the following is the best definition for energy?
the ability to generate electricity
the ability to generate heat
the ability to do work
the ability to produce fusion
The commercial unit of Energy is:
Watt
Kilowatt-hour
Watt-hour
Kilowatt
What is the smallest unit of power?
Watt
Kilowatt
Horse power
Milliwatt
