PHYS 1010 Final Exam Questions with
Complete Solutions
The force of air resistance normally increases as the object's ____________ increases
velocity
Whenever one object exerts a force on a second object, the second object exerts an equal and
opposite force on the first. Newton's 3rd law
___________ always come in pairs. forces
Whenever two objects are touching, there is the potential for the two objects to be exerting a
____________ on one another force
The acceleration is always in the same direction as the ________ __________. net force
the amount of 'umph' an object has. momentum
,What is the equation for momentum? momentum=mv
What is the SI unit for momentum? kg m/s
What is the momentum for a 300 kg vehicle moving to the right at 20 m/s? 6000 kg m/s
to the right (p=m/v, so 300 kg/20 m/s=p)
A change in an objects momentum impulse
So, for the momentum of our object to change, its _____________ must be changing.
velocity
So if we have a force which acts over some period of time, it can change the object's momentum
and therefore cause what? an impulse
What is the equation for impulse? impulse=ft
What is the SI unit for impulse? Newton seconds
, What is the impulse if a 500 N force, to the right, acts on the vehicle in the previous example for
3 seconds. (such as putting your foot on the gas peddle) 1500 N*s to the right
(impulse=Ft=500 N*3 seconds=impulse)
If no external impulse is applied to the "system", then the momentum of the "system" must do
what? remain constant
If there areno external impulses exerted on a system, we say that momentum is
_________________. conserved
a "bouncy" collision. The objects bounce off one another. elastic collision
is momentum conserved in an elastic collison? What about an inelastic collision?
momentum is conserved in both
a "sticky" collision. The objects stick together, like bumpers of two cars being locked together.
inelastic collision
Complete Solutions
The force of air resistance normally increases as the object's ____________ increases
velocity
Whenever one object exerts a force on a second object, the second object exerts an equal and
opposite force on the first. Newton's 3rd law
___________ always come in pairs. forces
Whenever two objects are touching, there is the potential for the two objects to be exerting a
____________ on one another force
The acceleration is always in the same direction as the ________ __________. net force
the amount of 'umph' an object has. momentum
,What is the equation for momentum? momentum=mv
What is the SI unit for momentum? kg m/s
What is the momentum for a 300 kg vehicle moving to the right at 20 m/s? 6000 kg m/s
to the right (p=m/v, so 300 kg/20 m/s=p)
A change in an objects momentum impulse
So, for the momentum of our object to change, its _____________ must be changing.
velocity
So if we have a force which acts over some period of time, it can change the object's momentum
and therefore cause what? an impulse
What is the equation for impulse? impulse=ft
What is the SI unit for impulse? Newton seconds
, What is the impulse if a 500 N force, to the right, acts on the vehicle in the previous example for
3 seconds. (such as putting your foot on the gas peddle) 1500 N*s to the right
(impulse=Ft=500 N*3 seconds=impulse)
If no external impulse is applied to the "system", then the momentum of the "system" must do
what? remain constant
If there areno external impulses exerted on a system, we say that momentum is
_________________. conserved
a "bouncy" collision. The objects bounce off one another. elastic collision
is momentum conserved in an elastic collison? What about an inelastic collision?
momentum is conserved in both
a "sticky" collision. The objects stick together, like bumpers of two cars being locked together.
inelastic collision
