PHY 110 Test 1 Study Guide With
Complete Solutions
What is the difference between speed and velocity? - ANSWER speed: distance covered
in the amount of time (scalar)
velocity: both direction and instantaneous speed (vector)
What are three different ways an object can accelerate? - ANSWER -increase or decrease
speed
-change direction
-both
Define instantaneous speed? what is a common instrument that measures this type of
speed? - ANSWER speed at any instant, speedometer
what are the units for force, weight, mass, and acceleration? - ANSWER Force/weight= N
Mass= KG
Acceleration = m/s^2
Explain each of newtons laws - ANSWER 1st: (Inertia) an object at rest tends to stay at
rest, unless acted upon an external force
, 2nd: (acceleration): acceleration is directly proportional to net force and indirectly
proportional to mass (acceleration of an object is equal to net force over mass)
3rd: (action/reaction): when one objects hits a second object, the second object exerts an
equal but opposite force
Compare Mass vs. Weight - ANSWER Mass: amount of matter in an object (stays the
same)
Weight: force of gravity on an object
Does mass every change? What is an objects mass on Jupiter? - ANSWER Mass never
changes, it would be the same as on earth
A 10N force and a 4N force act on an object. What is the largest (maximum) net force
that could act on the object? What is the smallest (minimum) net force that could act on
the object? - ANSWER Maximum: 14N
Minimum: 6N
Force always occurs in ______. - ANSWER pairs
If a rope suspends an object that weights 500N, what is the force the rope exerts on the
object? - ANSWER 500N
Complete Solutions
What is the difference between speed and velocity? - ANSWER speed: distance covered
in the amount of time (scalar)
velocity: both direction and instantaneous speed (vector)
What are three different ways an object can accelerate? - ANSWER -increase or decrease
speed
-change direction
-both
Define instantaneous speed? what is a common instrument that measures this type of
speed? - ANSWER speed at any instant, speedometer
what are the units for force, weight, mass, and acceleration? - ANSWER Force/weight= N
Mass= KG
Acceleration = m/s^2
Explain each of newtons laws - ANSWER 1st: (Inertia) an object at rest tends to stay at
rest, unless acted upon an external force
, 2nd: (acceleration): acceleration is directly proportional to net force and indirectly
proportional to mass (acceleration of an object is equal to net force over mass)
3rd: (action/reaction): when one objects hits a second object, the second object exerts an
equal but opposite force
Compare Mass vs. Weight - ANSWER Mass: amount of matter in an object (stays the
same)
Weight: force of gravity on an object
Does mass every change? What is an objects mass on Jupiter? - ANSWER Mass never
changes, it would be the same as on earth
A 10N force and a 4N force act on an object. What is the largest (maximum) net force
that could act on the object? What is the smallest (minimum) net force that could act on
the object? - ANSWER Maximum: 14N
Minimum: 6N
Force always occurs in ______. - ANSWER pairs
If a rope suspends an object that weights 500N, what is the force the rope exerts on the
object? - ANSWER 500N
