PHYSICS EXAM QUESTIONS AND
VERIFIED ANSWERS, 100%
GUARANTEE
An inelastic collision is one in which - answersmomentum is conserved, but kinetic
energy is not conserved. (kinetic energy before the collision is greater than kinetic
energy after the collision.)
A rocket leaves a launch pad at liftoff with a great deal of upward momentum. What was
initially given downward momentum? - answersThe expelled fuel
Mechanical energy is the difference between kinetic energy and gravitational potential
energy. - answersFalse
According to the conservation of mechanical energy, the kinetic energy before plus the
kinetic energy after equals the potential energy before plus the potential energy after. -
answersFalse
What is the proper unit for gravitational potential energy? - answersJoules
Power can be described as... - answersthe rate of energy transfer
An inelastic collision is one in which - answers
A circus performer juggles four identical balls. The performer throws each ball upward
with the same initial velocity and releases each ball at the same height. The ball with the
greatest kinetic energy will be the ball that the juggler - answersdoes not catch, just
before it lands on the floor.
You lift 220 N of water 1.0 m over a table in 0.45 seconds. What power have you
generated? - answersP = Fd/t = 220 n * 1m / .45 s = 490 W
Analyze the graph. Which quantity is equal to the impulse? - answersarea under the
curve
A gymnast falls from a height onto a trampoline. For a moment, both the gymnast's
kinetic energy and gravitational potential energy are zero. How is the gymnast's
mechanical energy stored for that moment? - answerselastic energy
Which conditions will result in the smallest change in momentum? - answersa small
force over a short time period
,A sports car accelerates at a constant rate from rest to a speed of 27.8 m/s in 8.00 s.
What is the displacement of the sports car in this time interval? - answers111 m
Human reaction time is usually about 0.20 s. If your lab partner holds a ruler between
your finger and thumb and releases it without warning, how far can you expect the ruler
to fall before you catch it? (Disregard air resistance. g = 9.8 m/s2.) - answersat least
19.6 cm
Objects that are falling toward Earth move - answersfaster and faster
Which would hit the ground first if dropped from the same height in a vacuum (no air
resistance), a feather or a metal bolt? - answersThey would hit the ground at the same
time.
Velocity = - answers∆x / ∆t
Acceleration = - answers∆v / ∆t
final velocity = - answersVᵢ + at
final displacement - answersXᵢ + Vᵢ t + 1/2at²
final velocity² - answersVᵢ² + 2a(∆x)
θ - answerstan⁻¹(opposite/adjacent)
Force - answersmass × acceleration
Significant Figures Definition - answersAll the valid digits in a measurement, the number
of which indicates the measurement's precision.
Modeling Definition - answersA representation of an idea,event,structure, or object to
help people better understand it.
Dimensional Analysis Definition - answersA method of treating units as algebraic
quantities that can be cancelled; can be used to check that answer will be in the correct
units.
Position Definition - answersThe distance and direction from the origin to an object.
Force due to gravity - answersmass × gravity
momentum (p) - answersW/t or (mass × velocity)
work - answersforce × distance
,force × time - answers(m × final velocity) - (m × Vᵢ)
∆p - answersforce × time
Precision Definition - answerslack of random error; state of being precise or exact.
Independent & Dependent Variables Definition - answers- The factor that is changed or
manipulated during an investigation.
- The factor in a investigation that depends on the independent variable .
Physics Definition - answersthe study of matter and energy.
Accuracy Definition - answersA description of how close a measurement is to the true
value of the quantity measured.
Average speed/velocity Definition - answers- The distance traveled divided by the time
taken to travel.
- The ratio of an object's change in position to time interval during which the change
occurred.
Potential Energy (PE) formula - answersmass × gravity × height
Mechanical Energy (ME) formula - answersKE + PE
Kinetic Energy (KE) formula - answers1/2mv²
Distance and Displacement definition - answers- The entire length of an object's path.
- A change in position having both magnitude and direction
Vector definition - answersA quantity that has magnitude and direction
Scalar Magnitude definition - answers- A quantity such as temperature or distance, that
is just a number without any direction
Displacement Definition - answersDistance and direction of an object's change in
position from the starting point.
Average Speed/Velocity definition - answerstotal distance/total time
Slope Definition and formula - answersrise over run
m= y2-y1/x2-x1
-parallel lines: have the same slope and all horizontal lines are parallel
-perpendicular lines: negative reciprocals of each other
-horizontal= 0
-vertical= undefined
, Frame of Reference definition - answersa system for specifying the precise location of
objects in space and time
Acceleration and Gravity definition - answersThe rate at which the velocity object
changes
vector components definition - answersParts into which a vector can be separated and
that act in different directions from the vector
projectile motion definition - answersthe curved path that an object follows when thrown,
launched, or otherwise projected near the surface of Earth
Newton's First Law definition - answersAn object at rest stays at rest and an object in
motion stays in motion with the same speed and in the same direction unless acted
upon by an unbalanced force.
Newton's Second Law definition - answersForce equals mass times acceleration
Newton's Third Law definition - answersFor every action there is an equal and opposite
reaction
contact force definition - answersa push or pull on one object by another that is touching
it
force diagram/free body diagram definition - answersa diagram showing all the forces
acting on an object
Equilibrium definition - answersA state of balance
field force definition - answersforce that can exist between objects, even in the absence
of physical contact between the objects
Interia definition - answersThe tendency of an object to resist a change in motion
Weight definition - answersA measure of the force of gravity on an object
Universal Law of Gravitation - answersone of Newton's three rules of motion; it explains
that planetary bodies continue in elliptical orbits around the sun because every object in
the universe is attracted to every other object by a force called gravity.
potential energy definition - answersstored energy
thermal energy definition - answersHeat energy
kinectic energy definition - answersenergy of motion
VERIFIED ANSWERS, 100%
GUARANTEE
An inelastic collision is one in which - answersmomentum is conserved, but kinetic
energy is not conserved. (kinetic energy before the collision is greater than kinetic
energy after the collision.)
A rocket leaves a launch pad at liftoff with a great deal of upward momentum. What was
initially given downward momentum? - answersThe expelled fuel
Mechanical energy is the difference between kinetic energy and gravitational potential
energy. - answersFalse
According to the conservation of mechanical energy, the kinetic energy before plus the
kinetic energy after equals the potential energy before plus the potential energy after. -
answersFalse
What is the proper unit for gravitational potential energy? - answersJoules
Power can be described as... - answersthe rate of energy transfer
An inelastic collision is one in which - answers
A circus performer juggles four identical balls. The performer throws each ball upward
with the same initial velocity and releases each ball at the same height. The ball with the
greatest kinetic energy will be the ball that the juggler - answersdoes not catch, just
before it lands on the floor.
You lift 220 N of water 1.0 m over a table in 0.45 seconds. What power have you
generated? - answersP = Fd/t = 220 n * 1m / .45 s = 490 W
Analyze the graph. Which quantity is equal to the impulse? - answersarea under the
curve
A gymnast falls from a height onto a trampoline. For a moment, both the gymnast's
kinetic energy and gravitational potential energy are zero. How is the gymnast's
mechanical energy stored for that moment? - answerselastic energy
Which conditions will result in the smallest change in momentum? - answersa small
force over a short time period
,A sports car accelerates at a constant rate from rest to a speed of 27.8 m/s in 8.00 s.
What is the displacement of the sports car in this time interval? - answers111 m
Human reaction time is usually about 0.20 s. If your lab partner holds a ruler between
your finger and thumb and releases it without warning, how far can you expect the ruler
to fall before you catch it? (Disregard air resistance. g = 9.8 m/s2.) - answersat least
19.6 cm
Objects that are falling toward Earth move - answersfaster and faster
Which would hit the ground first if dropped from the same height in a vacuum (no air
resistance), a feather or a metal bolt? - answersThey would hit the ground at the same
time.
Velocity = - answers∆x / ∆t
Acceleration = - answers∆v / ∆t
final velocity = - answersVᵢ + at
final displacement - answersXᵢ + Vᵢ t + 1/2at²
final velocity² - answersVᵢ² + 2a(∆x)
θ - answerstan⁻¹(opposite/adjacent)
Force - answersmass × acceleration
Significant Figures Definition - answersAll the valid digits in a measurement, the number
of which indicates the measurement's precision.
Modeling Definition - answersA representation of an idea,event,structure, or object to
help people better understand it.
Dimensional Analysis Definition - answersA method of treating units as algebraic
quantities that can be cancelled; can be used to check that answer will be in the correct
units.
Position Definition - answersThe distance and direction from the origin to an object.
Force due to gravity - answersmass × gravity
momentum (p) - answersW/t or (mass × velocity)
work - answersforce × distance
,force × time - answers(m × final velocity) - (m × Vᵢ)
∆p - answersforce × time
Precision Definition - answerslack of random error; state of being precise or exact.
Independent & Dependent Variables Definition - answers- The factor that is changed or
manipulated during an investigation.
- The factor in a investigation that depends on the independent variable .
Physics Definition - answersthe study of matter and energy.
Accuracy Definition - answersA description of how close a measurement is to the true
value of the quantity measured.
Average speed/velocity Definition - answers- The distance traveled divided by the time
taken to travel.
- The ratio of an object's change in position to time interval during which the change
occurred.
Potential Energy (PE) formula - answersmass × gravity × height
Mechanical Energy (ME) formula - answersKE + PE
Kinetic Energy (KE) formula - answers1/2mv²
Distance and Displacement definition - answers- The entire length of an object's path.
- A change in position having both magnitude and direction
Vector definition - answersA quantity that has magnitude and direction
Scalar Magnitude definition - answers- A quantity such as temperature or distance, that
is just a number without any direction
Displacement Definition - answersDistance and direction of an object's change in
position from the starting point.
Average Speed/Velocity definition - answerstotal distance/total time
Slope Definition and formula - answersrise over run
m= y2-y1/x2-x1
-parallel lines: have the same slope and all horizontal lines are parallel
-perpendicular lines: negative reciprocals of each other
-horizontal= 0
-vertical= undefined
, Frame of Reference definition - answersa system for specifying the precise location of
objects in space and time
Acceleration and Gravity definition - answersThe rate at which the velocity object
changes
vector components definition - answersParts into which a vector can be separated and
that act in different directions from the vector
projectile motion definition - answersthe curved path that an object follows when thrown,
launched, or otherwise projected near the surface of Earth
Newton's First Law definition - answersAn object at rest stays at rest and an object in
motion stays in motion with the same speed and in the same direction unless acted
upon by an unbalanced force.
Newton's Second Law definition - answersForce equals mass times acceleration
Newton's Third Law definition - answersFor every action there is an equal and opposite
reaction
contact force definition - answersa push or pull on one object by another that is touching
it
force diagram/free body diagram definition - answersa diagram showing all the forces
acting on an object
Equilibrium definition - answersA state of balance
field force definition - answersforce that can exist between objects, even in the absence
of physical contact between the objects
Interia definition - answersThe tendency of an object to resist a change in motion
Weight definition - answersA measure of the force of gravity on an object
Universal Law of Gravitation - answersone of Newton's three rules of motion; it explains
that planetary bodies continue in elliptical orbits around the sun because every object in
the universe is attracted to every other object by a force called gravity.
potential energy definition - answersstored energy
thermal energy definition - answersHeat energy
kinectic energy definition - answersenergy of motion
