WorksheetsPhysics - Unit #1 Lesson 7.2
Total questions: 22
Worksheet time: 14mins
An object may store energy by virtue of its position.
true
false
The amount of gravitational potential energy possessed by an elevated object is equal to the work done against gravity in lifting it.
true
false
No force is done in moving the ball horizontally when friction is present.
true
false
No force is done in moving the ball horizontally if we ignore friction.
true
false
Potential energy, gravitational or otherwise, has significance only when it changes - when it does work or transform into energy of some other form.
true
false
The potential energy of the ball or any object is not relative to some reference level.
true
false
The potential energy of the ball or any object is relative to some reference level.
true
false
Only changes in potential energy are meaningful.
true
false
One of the kinds of energy into which potential energy can change is energy of motion, or kinetic energy.
true
false
The only one kind of energy into which potential energy can change is energy of transformation.
true
false
One of the kinds of energy into which potential energy can change is energy of motion, or kinetic energy.
true
false
No changes in potential energy are meaningful.
true
false
Energy that is stored and held in readiness is ____________ ___________.
(a)
Energy that is stored and held in readiness is potential energy, because:
in the stored state it has no potential for doing the work,
in the stored state it has the potential for doing work.
Chemical energy in fuels is __________ ___________
(a)
_____________ __________ is found in fossil fuels, electric batteries, and the foods we consume.
(a)
How do you called potential energy due to elevated position?
(a)
Water in an elevated reservoir and the raised ram of a pile driver both have?
potential energy
kinetic energy
gravitational potential energy
What is the work done formula?
WF=d
W=F/d
work = force and distance
W = Fd
The upward force required while moving constant velocity is equal to the (a) of the object.
Gravitational potential energy =
(a)
When the potential energy of the 10-N ball is the ____ in all three cases because the work done in elevating it 3m is the same.
unbalance
different
same
