PHYS 1010 - Exam 1(Questions With 100% Correct
Answers)2024/2025 (A+ Graded Verified)
Three fundamental properties - ANSWER Mass
Length
Time
Mass - ANSWER the amount of matter or "physical substance" which an object or group of
objects possesses
Length - ANSWER the distance between two points in space
time - ANSWER the period or interval between two events
Unit of mass - ANSWER the kilogram
*on the earth, 1 kg has a weight of 9.8 newtons. this is approximately 2.2 lb.
Unit of length - ANSWER the meter
*1 m is approximately 3.28 ft
1 m = 100 cm
1 km = 1000 m
unit of time - ANSWER the second
*60s = 1 min etc
Speed - ANSWER the rate at which someone or thing is able to move or operate
V=D/t
equation for speed - ANSWER V=D/t
V=speed
D=distance
t=time
velocity - ANSWER the speed of something in a given direction
3 ways to change velocity - ANSWER 1- changing speed
2- changing the direction
3- changing the direction AND speed
acceleration - ANSWER increase in the rate or speed of something; basically how quickly
velocity changes (change in speed, acceleration, direction)
equation for acceleration - ANSWER a=v/t
, a=acceleration
v=velocity
t=time interval
Newton's 1st law of motion - ANSWER an 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 2nd law of motion - ANSWER the acceleration of an object as produced by a net
force is directly proportional to the magnitude of the net force, in the same direction as the net
force, and inversely proportional to the mass of the object
equation for Newton's 2nd law - ANSWER A=F/m
A=acceleration
f=force
m=mass
relationship between mass and weight - ANSWER in the absence of acceleration, mass and
weight are directly proportional to each other. if the mass of an object is doubled, its weight is
also doubles; if the mass is halved, the weight is halved. w=m
Newton's 3rd law of motion - ANSWER whenever one object exerts a force on a second
object, the second object exerts an equal and opposite force on the first
consistent with newton's 3rd law, what 4 conditions do all forces satisfy? - ANSWER
properties of forces (always true)
- occur in pairs
- equal in strength
- opposite in direction
- two different objects
Nature of freefall - ANSWER (no air resistance or other retarding forces) if the only force
acting on an object is gravity, then the acceleration will be determined by the single force
numerical value of acceleration due to gravity - ANSWER ft/s^2: g=32 ft/s^2
m/s^2: g=9.8 m/s^2
does g depend on the mass of the object? - ANSWER no, it determines the force, not the
acceleration
does g depend on the motion of the object? - ANSWER no, the motion of the object does not
effect the acceleration
*acceleration is not the same as velocity
*acceleration is constant and downward
Answers)2024/2025 (A+ Graded Verified)
Three fundamental properties - ANSWER Mass
Length
Time
Mass - ANSWER the amount of matter or "physical substance" which an object or group of
objects possesses
Length - ANSWER the distance between two points in space
time - ANSWER the period or interval between two events
Unit of mass - ANSWER the kilogram
*on the earth, 1 kg has a weight of 9.8 newtons. this is approximately 2.2 lb.
Unit of length - ANSWER the meter
*1 m is approximately 3.28 ft
1 m = 100 cm
1 km = 1000 m
unit of time - ANSWER the second
*60s = 1 min etc
Speed - ANSWER the rate at which someone or thing is able to move or operate
V=D/t
equation for speed - ANSWER V=D/t
V=speed
D=distance
t=time
velocity - ANSWER the speed of something in a given direction
3 ways to change velocity - ANSWER 1- changing speed
2- changing the direction
3- changing the direction AND speed
acceleration - ANSWER increase in the rate or speed of something; basically how quickly
velocity changes (change in speed, acceleration, direction)
equation for acceleration - ANSWER a=v/t
, a=acceleration
v=velocity
t=time interval
Newton's 1st law of motion - ANSWER an 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 2nd law of motion - ANSWER the acceleration of an object as produced by a net
force is directly proportional to the magnitude of the net force, in the same direction as the net
force, and inversely proportional to the mass of the object
equation for Newton's 2nd law - ANSWER A=F/m
A=acceleration
f=force
m=mass
relationship between mass and weight - ANSWER in the absence of acceleration, mass and
weight are directly proportional to each other. if the mass of an object is doubled, its weight is
also doubles; if the mass is halved, the weight is halved. w=m
Newton's 3rd law of motion - ANSWER whenever one object exerts a force on a second
object, the second object exerts an equal and opposite force on the first
consistent with newton's 3rd law, what 4 conditions do all forces satisfy? - ANSWER
properties of forces (always true)
- occur in pairs
- equal in strength
- opposite in direction
- two different objects
Nature of freefall - ANSWER (no air resistance or other retarding forces) if the only force
acting on an object is gravity, then the acceleration will be determined by the single force
numerical value of acceleration due to gravity - ANSWER ft/s^2: g=32 ft/s^2
m/s^2: g=9.8 m/s^2
does g depend on the mass of the object? - ANSWER no, it determines the force, not the
acceleration
does g depend on the motion of the object? - ANSWER no, the motion of the object does not
effect the acceleration
*acceleration is not the same as velocity
*acceleration is constant and downward
