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Forces and Momentum
Forces and Momentum
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Physics quiz on forces, Newton's laws of motion, gravity, friction, and momentum
Flashcards
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Questions
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Answers
1
Which object does
not
have momentum?
a boulder rolling down a hill.
a rock by the side of the road
a fish swimming in a pond
a feather falling to the ground
2
A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of
60.0 m/s
60.0 kg/s
0.6 kg*m/s
60.0 kg* m/s north
3
If a 5-kg cannon ball and a 15 kg cannon ball are dropped from the same height at the same time
impossible to predict.
the 5 kg ball will hit the ground first.
the 15 kg canon ball will hit the ground first.
they will hit the ground at the same time.
4
The metric unit of force is called the ____________ .
pound
stone
kilogram
newton
5
Which of the following is not a factor in calculating momentum?
speed
acceleration
mass
direction
6
The law that states for every action force there is an equal and opposite reaction force is
Law of conservation of momentum
Newton's third law of motion
Newton's first law of motion
Newton's second law of motion
7
Objects accelerate only when a(n) ________ net force acts on them.
equal and opposite
unbalanced
normal
balanced
8
When air resistance balances the weight of an object that is falling, the velocity
rapidly increases.
slowly decreases.
remains constant.
none of the above.
9
Which of the following is true?
Weight and mass are proportional but not equal.
THe weight of an object on earth is greater than on the moon
all of the above
weight if the gravitational force due to an object's mass.
10
What happens immediately after a skydiver opens her parachute?
The skydiver's speed greatly increases.
Air resistance greatly increases.
The force of gravity greatly increases.
The skydiver is in free fall.
11
ID the law: "Every object maintains constant velocity unless acted upon by an outside force."
the law of conservation of momentum
Newton's third law
Newton's first law
Newton's second law
12
If two objects with different velocities collide, what allows you to predict the motion after?
Newton's second law
Law of conservation of momentum
Newton's third law
Law of universal gravitation
13
How can the friction on a slide be reduced?
keep the surface of the slide dry
increase the slope of the slide
warm the surface of the slide
run a constant stream of water down the slide
14
The acceleration of an object is _________ proportional to the net force acting on it.
indirectly
inversely
not
directly
15
Friction is defined as
rate at which velocity changes
force that opposes motion between two surfaces in contact
resistance of an object to a change in its velocty
speed of an object in a particular direction
16
Weight is best described as
what causes an object to fall.
the downward force exerted on objects due to gravity.
an object's resistance to acceleration.
a force solely dependent on an object's mass.
17
What is the reaction force when you place a cup on a table?
The force of the cup on the table
the force of the table on the cup
the force of gravity on the table
the force of gravity on the cup.
18
The gravitational force of the earth on an object _____ as the object moves further from earth.
decreases
stays the same
increases
constantly changes
19
The amount of matter in an object is called _______.
weight
mass
inertia
heaviness
20
The combination of all the forces acting on an object is called the
union of forces.
super force.
net force.
total force.
