PHYS 1010 Final (UNE) exam questions with |\ |\ |\ |\ |\ |\ |\
answers
True or False: Useful work is the work done by an external system -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔False (done ON an external system)|\ |\ |\ |\ |\ |\ |\
A box is pulled across a floor. If the magnitude of the force was increased
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
but the angle was kept constant, the work done by the force would
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(increase/decrease) - CORRECT ANSWERS ✔✔Increase |\ |\ |\ |\
If the force and displacement are not collinear, which formula is used?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
W = F*d cos(Θ)
|\ |\ |\
or
W = F*d sin(Θ) - CORRECT ANSWERS ✔✔W = F*d cos(Θ)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
True or False: Work is done on a locked door that remains closed while you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
try to pull it open. - CORRECT ANSWERS ✔✔False (no
|\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
|\
True or False: Work is done on an object as you drop it from the second
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
floor of a building to the ground floor. - CORRECT ANSWERS ✔✔True (is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
, True or False: Work is done on dishes when you pull a tablecloth out from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
under them and they remain in place. - CORRECT ANSWERS ✔✔False (no
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
True or False: Energy cannot be created or destroyed within a closed system
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
with constant mass - only transformed to other forms - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔True |\
What is NOT a unit of power?
|\ |\ |\ |\ |\ |\
• kilowatt
|\
• J/s
|\
• horsepower
|\
• kcal - CORRECT ANSWERS ✔✔kcal
|\ |\ |\ |\ |\
If the net work on a system is zero, and the mass is constant, the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
velocity must be ______ to the initial velocity. - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔equal
True or False: The majority of energy consumed by the human body is used
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to maintain the basal metabolic rate - CORRECT ANSWERS ✔✔True
|\ |\ |\ |\ |\ |\ |\ |\ |\
Is this a statement of conservative force or a non-conservative force?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Mechanical energy is transferred to thermal energy due to friction along the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
path - CORRECT ANSWERS ✔✔Non-conservative force
|\ |\ |\ |\ |\
answers
True or False: Useful work is the work done by an external system -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔False (done ON an external system)|\ |\ |\ |\ |\ |\ |\
A box is pulled across a floor. If the magnitude of the force was increased
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
but the angle was kept constant, the work done by the force would
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
(increase/decrease) - CORRECT ANSWERS ✔✔Increase |\ |\ |\ |\
If the force and displacement are not collinear, which formula is used?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
W = F*d cos(Θ)
|\ |\ |\
or
W = F*d sin(Θ) - CORRECT ANSWERS ✔✔W = F*d cos(Θ)
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
True or False: Work is done on a locked door that remains closed while you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
try to pull it open. - CORRECT ANSWERS ✔✔False (no
|\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
|\
True or False: Work is done on an object as you drop it from the second
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
floor of a building to the ground floor. - CORRECT ANSWERS ✔✔True (is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
, True or False: Work is done on dishes when you pull a tablecloth out from
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
under them and they remain in place. - CORRECT ANSWERS ✔✔False (no
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
movement/distance)
True or False: Energy cannot be created or destroyed within a closed system
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
with constant mass - only transformed to other forms - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔True |\
What is NOT a unit of power?
|\ |\ |\ |\ |\ |\
• kilowatt
|\
• J/s
|\
• horsepower
|\
• kcal - CORRECT ANSWERS ✔✔kcal
|\ |\ |\ |\ |\
If the net work on a system is zero, and the mass is constant, the final
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
velocity must be ______ to the initial velocity. - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔equal
True or False: The majority of energy consumed by the human body is used
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to maintain the basal metabolic rate - CORRECT ANSWERS ✔✔True
|\ |\ |\ |\ |\ |\ |\ |\ |\
Is this a statement of conservative force or a non-conservative force?
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
Mechanical energy is transferred to thermal energy due to friction along the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
path - CORRECT ANSWERS ✔✔Non-conservative force
|\ |\ |\ |\ |\
